Casio CFX-9850GB PLUS User manual

fx-9860G Series
Software Version 1.10
User’s Guide
E
CASIO Worldwide Education Website
http://edu.casio.com
CASIO EDUCATIONAL FORUM
http://edu.casio.com/forum/

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TURNING POWER ON AND OFF
USING MODES
BASIC CALCULATIONS
REPLAY FEATURE
FRACTION CALCULATIONS
EXPONENTS
ONBOARD FUNCTION MANUAL
GRAPH FUNCTIONS
DUAL GRAPH
DYNAMIC GRAPH
TABLE FUNCTION
Quick-Start

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Quick-Start
Welcome to the world of graphing calculators.
Quick-Start is not a complete tutorial, but it takes you through many of the most
common functions, from turning the power on, and on to graphing complex equations.
When you’re done, you’ll have mastered the basic operation of this calculator and will
be ready to proceed with the rest of this user’s guide to learn the entire spectrum of
functions available.
Each step of the examples in Quick-Start is shown graphically to help you follow
along quickly and easily. When you need to enter the number 57, for example, we’ve
indicated it as follows:
Press fh.
Whenever necessary, we’ve included samples of what your screen should look like.
If you find that your screen doesn’t match the sample, you can restart from the
beginning by pressing the “All Clear” button o.
TURNING POWER ON AND OFF
To turn power on, press o.
To turn power off, press !
o
OFF
.
Calculator power turns off automatically if you do not perform any operation within
the Auto Power Off trigger time you specify. You can specify either 10 minutes or 60
minutes as the trigger time.
USING MODES
This calculator makes it easy to perform a wide range of calculations by simply
selecting the appropriate mode. Before getting into actual calculations and operation
examples, let’s take a look at how to navigate around the modes.
To select the RUN
• MAT mode
1. Press mto display the Main Menu.
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2. Use defc to highlight RUN
• MAT
and then press w.
This is the initial screen of the RUN
• MAT mode,
where you can perform manual calculations, matrix
calculations, and run programs.
BASIC CALCULATIONS
With manual calculations, you input formulas from left to right, just as they are written
on paper. With formulas that include mixed arithmetic operators and parentheses, the
calculator automatically applies true algebraic logic to calculate the result.
Example: 15 × 3 + 61
1. Press
oto clear the calculator.
2. Press
bf*d+gbw.
Parentheses Calculations
Example: 15 × (3 + 61)
1. Press
bf*(d
+gb)w.
Built-In Functions
This calculator includes a number of built-in scientific functions, including trigonometric
and logarithmic functions.
Example: 25 × sin 45˚
Important!
Be sure that you specify Deg (degrees) as the angle unit before you try this
example.
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1. Press!m to display the Setup screen.
2. Press
cccccc1(Deg)
to specify degrees as the angle unit.
3. Press
Jto clear the menu.
4. Press
oto clear the unit.
5. Press
cf*sefw.
REPLAY FEATURE
With the replay feature, simply press dor eto recall the last calculation that
was performed so you can make changes or re-execute it as it is.
Example: To change the calculation in the last example from (25 × sin 45˚) to
(25 × sin 55˚)
1. Press dto display the last calculation.
2. Press
dto move the cursor (I) to the right side of 4.
3. Press
Dto delete 4.
4. Press
f.
5. Press
wto execute the calculation again.
SET UPSET UP
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FRACTION CALCULATIONS
You can use the $key to input fractions into calculations. The symbol “ {” is used
to separate the various parts of a fraction.
Example: 31/16 + 37/9
1. Press
o.
2. Press db$bg+
dh$jw.
Indicates 871/144
Converting an Improper Fraction to a Mixed Fraction
While an improper fraction is shown on the display, press !Mto convert it to a
mixed fraction.
Press !Magain to convert back to an improper fraction.
Converting a Fraction to Its Decimal Equivalent
While a fraction is shown on the display, press Mto convert it to its decimal
equivalent.
Press Magain to convert back to a fraction.
<<
<<
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EXPONENTS
Example: 1250 × 2.065
1. Press
o.
2. Press
bcfa*c.ag.
3. Press
Mand the ^ indicator appears on the display.
4. Press
f. The ^5 on the display indicates that 5 is an exponent.
5. Press
w.
ONBOARD FUNCTION MANUAL
You can use the catalog function to display the command onboard function manual.
The onboard function manual includes an explanation of the command, syntax
information, one or more examples of how to use the command, and the function key
sequence.
Example: To display onboard function manual information for the nCrcommand.
1. Press o.
2. Press !e(CATALOG).
3. Press I(C) c.
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4. Press 5(HELP).
Onboard function manual
GRAPH FUNCTIONS
The graphing capabilities of this calculator makes it possible to draw complex graphs
using either rectangular coordinates (horizontal axis: x ; vertical axis: y ) or polar
coordinates (angle:
θ ; distance from origin: r ).
All of the following graphing examples are performed starting from the calculator setup
in effect immediately following a reset operation.
Example 1: To graph Y = X(X + 1)(X – 2)
1. Press
m.
2. Use
defc to highlight GRAPH,
and then press w.
3. Input the formula.
v(v+b)
(v-c)w
4. Press
6(DRAW) or wto draw the graph.
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Example 2: To determine the roots of Y = X(X + 1)(X – 2)
1. Press
!5(G-SLV).
2. Press 1(ROOT).
Press
efor other roots.
Example 3: Determine the area bounded by the origin and the X = –1 root obtained for
Y = X(X + 1)(X – 2)
1. Press !5(G-SLV)6(g).
2. Press 3(∫dx).
3. Use dto move the pointer to the location where
X = –1, and then press w. Next, use eto
move the pointer to the location where X = 0, and
then press wto input the integration range,
which becomes shaded on the display.
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DUAL GRAPH
With this function you can split the display between two areas and display two graph
windows.
Example: To draw the following two graphs and determine the points of intersection
Y1 = X(X + 1)(X – 2)
Y2 = X + 1.2
1. Press
!mcc1(G+G) to
specify “G+G” for the Dual Screen setting.
2. Press
J, and then input the two functions.
v(v+b)
(v-c)w
v+b.cw
3. Press
6(DRAW) or wto draw the graphs.
Box Zoom
Use the Box Zoom function to specify areas of a graph for enlargement.
1. Press
!2(ZOOM) 1(BOX).
2. Use
defcto move the pointer to
one corner of the area you want to specify and then
press w.
SET UPSET UP
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Quick-Start