Casio fx-92B User manual
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Contents
Important Information ............................................................. 2
Sample Operations.................................................................. 2
Initializing the Calculator........................................................ 2
Safety Precautions .................................................................. 2
Handling Precautions.............................................................. 2
Removing the Hard Case ........................................................ 3
Turning Power On and Off ...................................................... 3
Adjusting Display Contrast .................................................... 3
Key Markings ........................................................................... 3
Reading the Display ................................................................ 4
Using Menus ............................................................................ 5
Specifying the Calculation Mode ........................................... 5
Configuring the Calculator Setup .......................................... 5
Inputting Expressions and Values ......................................... 6
Toggling Calculation Results ................................................. 9
Basic Calculations ................................................................ 10
Remainder Calculations ....................................................... 12
Function Calculations ........................................................... 13
Using CALC............................................................................ 16
Statistical Calculations (STAT) ............................................. 16
Equation Calculations (EQN)................................................ 19
Creating a Number Table from a Function (TABLE) ........... 20
Using VERIFY (VERIF)........................................................... 21
Ratio Calculations (RATIO)................................................... 23
Calculation Ranges, Number of Digits,
and Precision ......................................................................... 24
Errors...................................................................................... 26
Before Assuming Malfunction of the Calculator... ............. 27
Replacing the Battery............................................................ 27
Specifications ........................................................................ 28
Frequently Asked Questions................................................ 28
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Important Information
• The displays and illustrations (such as key markings) shown in this User’s
Guide are for illustrative purposes only, and may differ somewhat from the
actual items they represent.
• The contents of this manual are subject to change without notice.
• In no event shall CASIO Computer Co., Ltd. be liable to anyone for special,
collateral, incidental, or consequential damages in connection with or
arising out of the purchase or use of this product and items that come with
it. Moreover, CASIO Computer Co., Ltd. shall not be liable for any claim of
any kind whatsoever by any other party arising out of the use of this product
and the items that come with it.
• Be sure to keep all user documentation handy for future reference.
Sample Operations
Sample operations in this manual are indicated by a icon. Unless
specifically stated, all sample operations assume that the calculator is in its
initial default setup. Use the procedure under “Initializing the Calculator” to
return the calculator to its initial default setup.
For information about the , 1, B, and *marks that are shown
in the sample operations, see “Configuring the Calculator Setup”.
Initializing the Calculator
Perform the following procedure when you want to initialize the calculator and
return the calculation mode and setup to their initial default settings. Note that
this operation also clears all data currently in calculator memory.
(CLR)(All)(Yes)
Safety Precautions
Battery
• Keep batteries out of the reach of small children.
• Use only the type of battery specified for this calculator in this manual.
Handling Precautions
• Even if the calculator is operating normally, replace the battery at least
once every two years.
A dead battery can leak, causing damage to and malfunction of the
calculator. Never leave a dead battery in the calculator.
• The battery that comes with the calculator discharges slightly during
shipment and storage. Because of this, it may require replacement
sooner than the normal expected battery life.
• Do not use an oxyride battery* or any other type of nickel-based
primary battery with this product. Incompatibility between such
batteries and product specifications can result in shorter battery life
and product malfunction.
• Avoid use and storage of the calculator in areas subjected to
temperature extremes, and large amounts of humidity and dust.
• Do not subject the calculator to excessive impact, pressure, or
bending.
• Never try to take the calculator apart.
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• Use a soft, dry cloth to clean the exterior of the calculator.
• Whenever discarding the calculator or batteries, be sure to do so in
accordance with the laws and regulations in your particular area.
* Company and product names used in this manual may be registered
trademarks or trademarks of their respective owners.
Removing the Hard Case
Before using the calculator, slide its hard
case downwards to remove it, and then affix
the hard case to the back of the calculator as
shown in the illustration nearby.
Turning Power On and Off
Press to turn on the calculator.
Press (OFF) to turn off the calculator.
Auto Power Off
Your calculator will turn off automatically if you do not perform any operation
for about 10 minutes. If this happens, press the key to turn the calculator
back on.
Adjusting Display Contrast
Display the CONTRAST screen by performing the following key operation:
(SETUP)A(;CONT). Next, use Band Cto adjust
contrast. After the setting is the way you want, press .
Important: If adjusting display contrast does not improve display readability,
it probably means that battery power is low. Replace the battery.
Key Markings
Pressing the or #key followed by a second
key performs the alternate function of the second key.
The alternate function is indicated by the text printed
above the key.
The following shows what the different colors of the
alternate function key text mean.
If key marking text
is this color: It means this:
Yellow Press and then the key to access the
applicable function.
Red Press #and then the key to input the
applicable variable, constant, or symbol.
Asn D
s
Alternate function
Keycap function
Asn D
s
Alternate function
Keycap function
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Reading the Display
The display of the calculator shows expressions you input, calculation results,
and various indicators.
Input expression Indicators
Calculation result
• If a indicator appears on the right side of the calculation result, it means
the displayed calculation result continues to the right. Use Cand Bto
scroll the calculation result display.
• If a Eindicator appears on the right side of the input expression, it means
the displayed calculation continues to the right. Use Cand Bto scroll the
input expression display. Note that if you want to scroll the input expression
while both the and Eindicators are displayed, you will need to press
first and then use Cand Bto scroll.
Display indicators
This
indicator: Means this:
S
The keypad has been shifted by pressing the key. The
keypad will unshift and this indicator will disappear when
you press a key.
A
The alpha input mode has been entered by pressing the
#key. The alpha input mode will be exited and this
indicator will disappear when you press a key.
MThere is a value stored in independent memory.
STO
The calculator is standing by for input of a variable name to
assign a value to the variable. This indicator appears after
you press B(STO).
RCL
The calculator is standing by for input of a variable name to
recall the variable’s value. This indicator appears after you
press B.
STAT The calculator is in the STAT Mode.
The default angle unit is degrees.
The default angle unit is radians.
The default angle unit is grads.
FIX A fixed number of decimal places is in effect.
SCI A fixed number of significant digits is in effect.
Math Natural Display is selected as the display format.
>
Calculation history memory data is available and can be
replayed, or there is more data above/below the current
screen.
Disp The display currently shows an intermediate result of a
multi-statement calculation.
Important: For some type of calculation that takes a long time to execute,
the display may show only the above indicators (without any value) while it
performs the calculation internally.
Math Math
Math Math
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Using Menus
Some of the calculator’s operations are performed using menus. Pressing
, for example, will display a menu of applicable functions.
The following are the operations you should use to navigate between
menus.
• You can select a menu item by pressing the number key that corresponds
to the number to its left on the menu screen.
• The indicator in the upper right corner of a menu means there is another
menu below the current one. The >indicator means another menu above.
Use Aand Dto switch between menus.
• To close a menu without selecting anything, press .
Specifying the Calculation Mode
When you want to perform this type of
operation:
Perform this key
operation:
General calculations (COMP)
Statistical and regression calculations (STAT)
Equation solution (EQN)
Generation of a number table based on an
expression (TABLE)
Verify a calculation (VERIF)
Ratio calculations (RATIO)
Note: The initial default calculation mode is the COMP Mode.
Configuring the Calculator Setup
First perform the following key operation to display the setup menu:
(SETUP). Next, use Aand Dand the number keys to configure
the settings you want.
Underlined ( ___ ) settings are initial defaults.
MthIO LineIO Specifies the display format.
Natural Display (MthIO) causes fractions,
irrational numbers, and other expressions to be
displayed as they are written on paper.
MthIO: Selects MathO or LineO. MathO displays
input and calculation results using the same format as they are written on
paper. LineO displays input the same way as MathO, but calculation results
are displayed in linear format.
Linear Display (LineIO) causes fractions and
other expressions to be displayed in a single
line.
Note: • The calculator switches to Linear Display automatically whenever
you enter the STAT Mode. • In this manual, the symbol next to a
sample operation indicates Natural Display (MathO), while the 1symbol
indicates Linear Display.
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Deg Rad Gra Specifies degrees, radians or grads as the angle
unit for value input and calculation result display.
Note: In this manual, the Bsymbol next to a sample operation indicates
degrees, while the *symbol indicates radians.
Fix Sci Norm Specifies the number of digits for display of a
calculation result.
Fix: The value you specify (from 0 to 9) controls the number of decimal
places for displayed calculation results. Calculation results are rounded off
to the specified digit before being displayed.
Example: 1100 ÷ 7 = 14.286 (Fix 3)
14.29 (Fix 2)
Sci: The value you specify (from 1 to 10) controls the number of significant
digits for displayed calculation results. Calculation results are rounded off to
the specified digit before being displayed.
Example: 11 ÷ 7 = 1.4286 s10–1 (Sci 5)
1.429 s10–1 (Sci 4)
Norm: Selecting one of the two available settings (Norm 1, Norm 2)
determines the range in which results will be displayed in non-exponential
format. Outside the specified range, results are displayed using exponential
format.
Norm 1: 10–2 |x|, |x| >1010 Norm 2: 10–9 |x|, |x| >1010
Example: 11 ÷ 200 = 5 s10–3 (Norm 1)
0.005 (Norm 2)
Aab/c Ad/c Specifies either mixed fraction (a+b/c) or improper
fraction (d/c) for display of fractions in calculation results.
ASTAT ON ; OFF Specifies whether or not to display a FREQ
(frequency) column in the STAT Mode Stat Editor.
A;CONTAdjusts display contrast. See “Adjusting Display
Contrast” for details.
Initializing Calculator Settings
Perform the following procedure to initialize the calculator, which returns the
calculation mode to COMP and returns all other settings, including setup
menu settings, to their initial defaults.
(CLR)(Setup)(Yes)
Inputting Expressions and Values
Basic Input Rules
Calculations can be input in the same form as they are written. When you
press the priority sequence of the input calculation will be evaluated
automatically and the result will appear on the display.
4 ssin30 s(30 + 10 s3) = 120
4 Q30 30 10 3
*
1
*
2*
3
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*1Input of the closing parenthesis is required for sin, sinh, and other functions
that include parentheses.
*2These multiplication symbols (s) can be omitted. A multiplication symbol
can be omitted when it occurs immediately before an opening parenthesis,
immediately before sin or other function that includes parentheses,
immediately before the Ran# (random number) function, or immediately
before a variable (A, B, C, D, E, F, M, X, Y), Por e.
*3The closing parenthesis immediately before the operation can be
omitted.
Input example omitting *2and *3operations in the above
example.
4 Q30 30 10 3
Note: • If the calculation becomes longer than the screen width during
input, the screen will scroll automatically to the right and the ;indicator will
appear on the display. When this happens, you can scroll back to the left by
using Band Cto move the cursor. • When Linear Display is selected,
pressing Dwill cause the cursor to jump to the beginning of the calculation,
while Awill jump to the end. • When Natural Display is selected, pressing
Cwhile the cursor is at the end of the input calculation will cause it to jump
to the beginning, while pressing Bwhile the cursor is at the beginning will
cause it to jump to the end. • You can input up to 99 bytes for a calculation.
Each numeral, symbol, or function normally uses one byte. Some functions
require three to 10 bytes. • The cursor will change shape to Iwhen there are
10 bytes or less of allowed input remaining. If this happens, end calculation
input and then press .
Calculation Priority Sequence
The priority sequence of input calculations is evaluated in accordance with the
rules below. When the priority of two expressions is the same, the calculation
is performed from left to right.
1st Parenthetical expressions
2nd Functions that come after the input value (x2, x3, x–1, x!, °’ ”, °, r, g,
%), powers (x9), roots ()
3rd Fractions
4th
Negative sign (–)
Note: When squaring a negative value (such as –2), the value
being squared must be enclosed in parentheses (2 7;
). Since x2has a higher priority than the negative sign,
inputting 2 7would result in the squaring of 2 and then
appending a negative sign to the result. Always keep the priority
sequence in mind, and enclose negative values in parentheses
when required.
5th STAT Mode estimated values (K, L, K1, K2)
6th Multiplication where the multiplication sign is omitted
7th Multiplication, division (s, ÷), remainder calculations (÷R)
8th Addition, subtraction (+, –)
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Inputting with Natural Display
Selecting Natural Display makes it possible to input and display fractions
and certain functions (x2, x3, x9, , , , x−1, 109, e9, Abs) just as they
are written in your textbook.
2 + '
2
1 + '
2
2 7() 2 CC
1 7() 2
Important: • Certain types of expressions can cause the height of a
calculation formula to be greater than one display line. The maximum
allowable height of a calculation formula is two display screens (31 dots s2).
Further input will become impossible if the height of the calculation you are
inputting exceeds the allowable limit. • Nesting of functions and parentheses
is allowed. Further input will become impossible if you nest too many functions
and/or parentheses. If this happens, divide the calculation into multiple parts
and calculate each part separately.
Note: When you press and obtain a calculation result using Natural
Display, part of the expression you input may be cut off. If you need to view
the entire input expression again, press and then use Band Cto
scroll the input expression.
Using Values and Expressions as Arguments
(Natural Display only)
A value or an expression that you have already input can be used as the
argument of a function. After you have input 7
6, for example, you can make
it the argument of , resulting in 7
6
'
.
To input 1 + 7
6and then change it to 1 + 7
6
'
1 7 6
BBBB)(INS)
7()
As shown above, the value or expression to the right of the cursor after
)(INS) are pressed becomes the argument of the function that is
specified next. The range encompassed as the argument is everything up
to the first open parenthesis to the right, if there is one, or everything up to
the first function to the right (sin(30), Acs(–1), etc.)
This capability can be used with the following functions: , (),
:(), 7(), 7(), , (), (Abs).
Overwrite Input Mode (Linear Display only)
You can select either insert or overwrite as the input mode, but only while
Linear Display is selected. In the overwrite mode, text you input replaces the
text at the current cursor location. You can toggle between the insert and
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overwrite modes by performing the operations: )(INS). The cursor
appears as “I” in the insert mode and as “ ” in the overwrite mode.
Note: Natural Display always uses the insert mode, so changing display
format from Linear Display to Natural Display will automatically switch to
the insert mode.
Correcting and Clearing an Expression
To delete a single character or function: Move the cursor so it is directly to
the right of the character or function you want to delete, and then press ).
In the overwrite mode, move the cursor so it is directly under the character
or function you want to delete, and then press ).
To insert a character or function into a calculation: Use Band Cto
move the cursor to the location where you want to insert the character or
function and then input it. Be sure always to use the insert mode if Linear
Display is selected.
To clear all of the calculation you are inputting: Press .
Toggling Calculation Results
While Natural Display is selected, each press of 5will toggle the currently
displayed calculation result between its fraction form and decimal form, its
form and decimal form, or its Pform and decimal form.
P÷ 6 = 1
6= 0.5235987756
(P)6 1
6f0.5235987756
(
'
2+ 2) s'
3= '
6 + 2'
3= 5.913591358
7() 2 C2 W
7() 3 U'
6+2'
3f5.913591358
While Linear Display is selected, each press of 5will toggle the currently
displayed calculation result between its decimal form and fraction form.
1 ÷ 5 = 0.2 = 1
51
1 5 0.2 f1Y5
1 –
4
5= 1
5= 0.2 1
1 4 5 1Y5f0.2
Important: • Depending on the type of calculation result that is on the display
when you press the 5key, the conversion process may take some time to
perform. • With certain calculation results, pressing the 5key will not convert
the displayed value. • You cannot switch from decimal form to mixed fraction
form if the total number of digits used in the mixed fraction (including integer,
numerator, denominator, and separator symbols) is greater than 10.
Note: With Natural Display (MathO), pressing instead of after
inputting a calculation will display the calculation result in decimal form.
Pressing 5after that will switch to the fraction form or Pform of the
calculation result. The form of the result will not appear in this case.
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Basic Calculations
Fraction Calculations
Note that the input method for fractions is different, depending upon whether
you are using Natural Display or Linear Display.
2 +1 =7
3 2 6 2 3 C1 2 7
6
or 2 A3 C1 A2 7
6
12 3 1 2 7Y6
Note: • Mixing fractions and decimal values in a calculation while Linear
Display is selected will cause the result to be displayed as a decimal value.
• Fractions in calculation results are displayed after being reduced to their
lowest terms. • A value like 2 Y1 Y3 input using Linear format is assumed to
be and calculated as a mixed fraction of the form a+b/c (2 Y1 Y3 = 2+1/3).
To switch a calculation result between improper fraction and mixed
fraction form: Perform the following key operation: 5()
To switch a calculation result between fraction and decimal form:
Press 5.
Percent Calculations
Inputting a value and pressing causes the input value to become a
percent.
150 s20% = 30 150 20 30
Calculate what percentage of 880 is 660. (75%)
660 880 75
Increase 2500 by 15%. (2875)
2500 2500 15 2875
Discount 3500 by 25%. (2625)
3500 3500 25 2625
Degree, Minute, Second (Sexagesimal) Calculations
Performing an addition or subtraction operation between sexagesimal values,
or a multiplication or division operation between a sexagesimal value and a
decimal value will cause the result to be displayed as a sexagesimal value.
You also can convert between sexagesimal and decimal. The following
is the input format for a sexagesimal value: {degrees} {minutes}
{seconds} .
Note: You must always input something for the degrees and minutes, even
if they are zero.
2°20´30˝ + 39´30˝ = 3°00´00˝
2 20 30 0 39 30 3°0´0˝
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Convert 2°15´18˝ to its decimal equivalent.
2 15 18 2°15´18˝
(Converts sexagesimal to decimal.) 2.255
(Converts decimal to sexagesimal.) 2°15´18˝
Multi-Statements
You can use the colon character (:) to connect two or more expressions and
execute them in sequence from left to right when you press .
3 + 3 : 3 s3 3 3 (:) 3 3 6
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Calculation History
In the COMP Mode, the calculator remembers up to approximately 200 bytes
of data for the newest calculation. You can scroll through calculation history
contents using Dand A.
1 + 1 = 2 1 1 2
2 + 2 = 4 2 2 4
3 + 3 = 6 3 3 6
(Scrolls back.) D4
(Scrolls back again.) D2
Note: Calculation history data is all cleared whenever you press , when
you change to a different calculation mode, when you change the display
format, or whenever you perform any reset operation.
Replay
While a calculation result is on the display, you can press Bor Cto edit
the expression you used for the previous calculation.
4 × 3 + 2.5 = 14.5 14 3 2.5 14.5
4 × 3 − 7.1 = 4.9 (Continuing) B))))7.1 4.9
Note: If you want to edit a calculation when the indicator is on the right
side of a calculation result display (see “Reading the Display”), press
and then use Band Cto scroll the calculation.
Answer Memory (Ans)
The last calculation result obtained is stored in Ans (answer) memory.
Ans memory contents are updated whenever a new calculation result is
displayed.
To divide the result of 3 s4 by 30 1
3 4
(Continuing) 30
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123 + 456 = 579 123 456
789 – 579 = 210
(Continuing) 789
Variables (A, B, C, D, E, F, X, Y)
Your calculator has eight preset variables named A, B, C, D, E, F, X, and Y. You
can assign values to variables and also use the variables in calculations.
To assign the result of 3 + 5 to variable A
3 5 B(STO)E(A) 8
To multiply the contents of variable A by 10
(Continuing) #E(A)10 80
To recall the contents of variable A (Continuing) BE(A) 8
To clear the contents of variable A 0 B(STO)E(A) 0
Independent Memory (M)
You can add calculation results to or subtract results from independent
memory. The “M” appears on the display when there is any value other than
zero stored in independent memory.
To clear the contents of M 0 B(STO)J(M) 0
To add the result of 10 s5 to M (Continuing) 10 5 J50
To subtract the result of 10 + 5 from M
(Continuing) 10 5 J(M–) 15
To recall the contents of M (Continuing) BJ(M) 35
Note: Variable M is used for independent memory.
Clearing the Contents of All Memories
Ans memory, independent memory, and variable contents are retained even
if you press , change the calculation mode, or turn off the calculator.
Perform the following procedure when you want to clear the contents of
all memories.
(CLR)(Memory)(Yes)
Remainder Calculations
You can use the ÷R function in order to obtain the quotient and remainder
in a division calculation.
To calculate the quotient and remainder of 5 ÷ 2
5 A2
Quotient Remainder
MathMath
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15 A2
Quotient Remainder
Note: • Only the quotient value of a ÷R calculation is stored in Ans memory.
• Assigning the result of a remainder division calculation to a variable will assign
the quotient value only. Performing the operation 5 A2 B(STO)4
(which assigns the result of 5÷R2 to X) will assign a value of 2 to X. • If a ÷R
calculation is part of a multi-step calculation, only the quotient is passed on
to the next operation. (Example: 10 17 A6 m10 + 2) • Operation
of the 5, and 4keys is disabled while a remainder division result is on
the display.
Cases when Remainder Division becomes
Non-remainder Division
If either of the following conditions exists when you perform a remainder
division operation, the calculation will be treated as normal (non-remainder)
division.
• When either the dividend or the divisor is a very large value
Example: 20000000000 A17
mCalculated as: 20000000000 ÷ 17
• When the quotient is not a positive integer, or if the remainder is not a
positive integer or positive fractional value
Example: 5 A2 mCalculated as: –5 ÷ 2
Function Calculations
For actual operations using each function, see the “Examples” section
following the list below.
:Pis displayed as 3.141592654, but P= 3.14159265358980 is used for
internal calculations.
sin, cos, tan, Asn, Acs, Atn Trigonometric functions. Specify the angle unit
before performing calculations. See 1.
°, r, g
:These functions specify the angle unit. ° specifies degrees, rradians,
and ggrads. Input a function from the menu that appears when you perform
the following key operation: (DRG). See 2.
,
:Exponential functions. Note that the input method is different
depending upon whether you are using Natural Display or Linear Display.
See 3.
log
:Logarithmic function. See 4.
ln
:Natural logarithm to base e. See 5.
x2, x3, x9, , , , x−1
:Powers, power roots, and reciprocals. Note that
the input methods for x9, , , and are different depending upon
whether you are using Natural Display or Linear Display. See 6.
Note: The following functions cannot be input in consecutive sequence: x2,
x3, x9, x−1. If you input 277, for example, the final 7will be ignored. To
input 2
2
2, input 27, press the Bkey, and then press 7().
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Pol(x, y) = (r, θ) Rec(r, θ) = (x, y)
Rectangular Polar
Coordinates (Rec) Coordinates (Pol)
Pol, Rec :Pol converts rectangular coordinates to polar coordinates, while
Rec converts polar coordinates to rectangular coordinates. See 7.
Specify the angle unit before
performing calculations.
The calculation result for rand θ
and for xand yare each assigned
respectively to variables X and Y.
Calculation result
Q
is displayed
in the range of −180°
Q
180°.
x!:Factorial function. See 8.
Abs :Absolute value function. Note that the input method is different
depending upon whether you are using Natural Display or Linear Display.
See 9.
Ran# :Generates a 3-digit pseudo random number that is less than 1. The
result is displayed as a fraction when Natural Display is selected. See 10.
RanInt# :For input of the function of the form RanInt#(a, b), which generates
a random integer within the range of ato b. See 11.
Rnd :The argument of this function is made a decimal value and then rounded
in accordance with the current number of display digits setting (Norm, Fix, or
Sci). With Norm 1 or Norm 2, the argument is rounded off to 10 digits. With
Fix and Sci, the argument is rounded off to the specified digit. When Fix 3
is the display digits setting, for example, the result of 10 ÷ 3 is displayed
as 3.333, while the calculator maintains a value of 3.33333333333333 (15
digits) internally for calculation. In the case of Rnd(10÷3) = 3.333 (with Fix
3), both the displayed value and the calculator’s internal value become
3.333. Because of this a series of calculations will produce different results
depending on whether Rnd is used (Rnd(10÷3) s3 = 9.999) or not used (10
÷ 3 s3 = 10.000). See 12.
Note: Using functions can slow down a calculation, which may delay display
of the result. Do not perform any subsequent operation while waiting for the
calculation result to appear. To interrupt an ongoing calculation before its
result appears, press .
Examples
sin 30°= 0.5 1B Q30 0.5
Asn 0.5 = 30° 1B Q(Asn) 0.5 30
P/2 radians = 90°, 50 grads = 45° B
(P)2 (DRG)A(r)90
50 (DRG)B(g)45
To calculate e5s2 to three significant digits (Sci 3)
(SETUP)(Sci)
7() 5 C2 2.97×102
17() 5 2 2.97×102
log101000 = log 1000 = 3 :1000 3
11
22
33
44
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To calculate ln 90 (= loge90) to three significant digits (Sci 3)
(SETUP)(Sci)790 4.50×100
1.2 s103= 1200 1.2 10 3 1200
(1+1)2+2 = 16 1 1 2 2 16
(52)3= 15625 5 V 15625
32
5= 2 () 5 C32 2
15() 32 2
To calculate '
2 × 3(= 3'
2= 4.242640687...) to three decimal
places (Fix 3)
(SETUP)(Fix)
V() 2 C3 U3'
2
U 4.243
1V() 2 3 U4.243
To convert rectangular coordinates ('
2, '
2) to polar coordinates
B
(Pol)V() 2 CB(,)
V() 2 CUr=2,θ=45
1(Pol)V() 2B(,)
V() 2 Ur= 2
θ= 45
To convert polar coordinates ('
2, 45°) to rectangular coordinates
B
(Rec)V() 2 C
B(,) 45UX=1,Y=1
(5 + 3) ! = 40320 5 3 (x!)40320
|2 – 7| s2 = 10
(Abs) 2 7 C2 U10
1(Abs) 2 7 2 U10
To obtain three random three-digit integers
1000 (Ran#)459
48
117
(Results shown here are for illustrative purposes only. Actual results will differ.)
To generate random integers in the range of 1 to 6
#(RanInt) 1 B(,) 6 2
6
1
(Results shown here are for illustrative purposes only. Actual results will differ.)
55
66
77
88
99
1010
1111
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To perform the following calculations when Fix 3 is selected for the
number of display digits: 10 ÷ 3 s3 and Rnd(10 ÷ 3) s3 1
(SETUP)(Fix)10 3 3 10.000
(Rnd) 10 3 3 9.999
Using CALC
CALC lets you save calculation expressions that contain variables, which
you can then recall and execute in the COMP Mode (). The following
describes the types of expressions you can save with CALC.
• Expressions: 2X + 3Y, 2AX + 3BY + C
• Multi-statements: X + Y : X (X + Y)
• Equalities with a single variable on the left and an expression including
variables on the right: A = B + C, Y = X2+ X + 3
(Use to input the equals sign of the equality.)
To store 3A + B and then substitute the following values to perform
the calculation: (A, B) = (5, 10), (7, 20)
3 #(A)#A(B)
A
Prompts for input of a value for A Current value of A
5 10
A(or )
7 20
To exit CALC:
Note: During the time from when you press Auntil you exit CALC by
pressing , you should use Linear Display input procedures for input.
Statistical Calculations (STAT)
To start a statistical calculation, perform the key operation (STAT)
to enter the STAT Mode and then use the screen that appears to select the
type of calculation you want to perform.
1212
MathMath
E-17
To select this type of statistical calculation: Press this key:
Single-variable (X) (1-VAR)
Paired-variable (X, Y), linear regression (
y= Ax+ B) (AX+B)
Pressing any of the above keys (to ) displays the Stat Editor.
Note: When you want to change the calculation type after entering the
STAT Mode, perform the key operation (STAT)(Type) to display
the calculation type selection screen.
Inputting Data
Use the Stat Editor to input data. Perform the following key operation to
display the Stat Editor: (STAT)(Data).
The Stat Editor provides 80 rows for data input when there is an X column
only, 40 rows when there are X and FREQ columns or X and Y columns, or
26 rows when there are X, Y, and FREQ columns.
Note: Use the FREQ (frequency) column to input the quantity (frequency) of
identical data items. Display of the FREQ column can be turned on (displayed)
or off (not displayed) using the Stat Format setting on the setup menu.
To select linear regression and input the following data:
(170, 66), (173, 68), (179, 75)
(STAT)(AX + B)
170 173 179 AC
66 68 75
Important: • All data currently input in the Stat Editor is deleted whenever
you exit the STAT Mode, switch between the single-variable and a paired-
variable statistical calculation type, or change the Stat Format setting on
the setup menu. • The following operations are not supported by the Stat
Editor: ;, ;(M–), B(STO). Pol, Rec, ÷R and multi-statements
also cannot be input with the Stat Editor.
To change the data in a cell: In the Stat Editor, move the cursor to the cell
that contains the data you want to change, input the new data, and then
press .
To delete a line: In the Stat Editor, move the cursor to the line that you want
to delete and then press ).
To insert a line: In the Stat Editor, move the cursor to the location where
you want to insert the line and then perform the following key operation:
(STAT)(Edit)(Ins).
To delete all Stat Editor contents: In the Stat Editor, perform the following
key operation: (STAT)(Edit)(Del-A).
11
STATSTAT
STATSTAT
STATSTAT
E-18
Obtaining Statistical Values from Input Data
To obtain statistical values, press while in the Stat Editor and then
recall the statistical variable (Sx, 3x2, etc.) you want. Supported statistical
variables and the keys you should press to recall them are shown below.
For single-variable statistical calculations, the variables marked with an
asterisk (*) are available.
Sum: 3x2*, 3x*, 3y2, 3y, 3xy, 3x3, 3x2y, 3x4
(STAT) (Sum) to
Number of Items: n*, Mean: M*, N, Population Standard Deviation: Sx*,
Sy, Sample Standard Deviation: sx*, sy
(STAT) (Var) to
Minimum Value: minX*, minY, Maximum Value: maxX*, maxY
(STAT) (MinMax) to
(When the single-variable statistical calculation is selected)
(STAT) (MinMax) to
(When a paired-variable statistical calculation is selected)
Regression Coefficients for linear regression (y= Ax + B): A, B,
Correlation Coefficient: r, Estimated Values: K, L
(STAT) (Reg) to
• K, and Lare not variables. They are commands of the type that take an
argument immediately before them. See “Calculating Estimated Values”
for more information.
To input the single-variable data x= {1, 2, 2, 3, 3, 3, 4, 4, 5}, using
the FREQ column to specify the number of repeats for each items
({xn; freqn} = {1;1, 2;2, 3;3, 4;2, 5;1}), and calculate the mean and
population standard deviation.
(SETUP)A(STAT)(ON)
(STAT)(1-VAR)
1 2 3 4 5 AC
1 2 3 2
(STAT)(Var)(M)
(STAT)(Var)(Sx)
Results: Mean: 3 Population Standard Deviation: 1.154700538
To calculate the linear regression and logarithmic regression
correlation coefficients for the following paired-variable data and
determine the regression formula for the strongest correlation: (x,
y) = (20, 3150), (110, 7310), (200, 8800), (290, 9310). Specify Fix
3 (three decimal places) for results.
(SETUP)A(STAT)(OFF)
(SETUP)(Fix)
(STAT)(AX + B)
20 110 200 290 AC
3150 7310 8800 9310
(STAT)(Reg)(r)
22
STATSTAT
33
STAT FIX
STAT FIX
E-19
(STAT)(Reg)(A)
(STAT)(Reg)(B)
Results: Linear Regression Correlation Coefficient: 0.923
Linear Regression Formula: y= 22.189 x+ 3703.222
Calculating Estimated Values
Based on the regression formula obtained by paired-variable statistical
calculation, the estimated value of ycan be calculated for a given x-value.
The corresponding x-value also can be calculated for a value of yin the
regression formula.
To determine the estimate value for ywhen x= 160 in the
regression formula produced by Linear regression of the data
in 3. Specify Fix 3 for the result. (Perform the following operation
after completing the operations in 3.)
160 (STAT)(Reg)(L)
Result: 7253.444
Important: Regression coefficient, correlation coefficient, and estimated
value calculations can take considerable time when there are a large number
of data items.
Equation Calculations (EQN)
You can use the following procedure in the EQN Mode to solve simultaneous
linear equations with two or three unknowns.
1. Press (EQN) to enter the EQN Mode.
2. On the menu that appears, select an equation type.
To select this calculation type: Press this key:
Simultaneous linear equations with two
unknowns (anX + bnY = cn)
Simultaneous linear equations with
three unknowns (anX + bnY + cnZ = dn)
3. Use the Coefficient Editor that appears to input coefficient values.
• To solve x + 2y= 3 ; 2x + 3y= 4, for example, press in step 2, and
then input the following for the coefficients (a1 = 1, b1= 2, c1= 3, a2= 2,
b2= 3, c2= 4) : 1 U2 U3 U2 U3 U4 U.
• To change a coefficient value you already have input, move the cursor
to the appropriate cell, input the new value, and then press .
• Pressing will clear all of the coefficients to zero.
Important: The following operations are not supported by the Coefficient
Editor: ;, ;(M–), B(STO). Pol, Rec, ÷R and multi-statements
also cannot be input with the Coefficient Editor.
4. After all the values are the way you want, press .
• This will display a solution. Each press of will display another
solution. Pressing while the final solution is displayed will return to
the Coefficient Editor.
• You can scroll between the solutions using the Aand Dkeys.
• To return to the Coefficient Editor while any solution is displayed, press
.
44
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