HP 10s+ User manual

HP 10s+ Scientific Calculator
User Guide

© Copyright 2012 Hewlett-Packard Development Company, L.P.
The information contained herein is subject to change without
notice. The only warranties for HP products and services are set
forth in the express warranty statements accompanying such
products and services. Nothing herein should be construed as
constituting an additional warranty. HP shall not be liable for
technical or editorial errors or omissions contained herein.
First Edition: June 2012
Part number: 697634-001

i
Using the Protective Case . . . . . . . . . . . .1
Safety Precautions . . . . . . . . . . . . . . . . . .1
Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Disposing of the Calculator. . . . . . . . . . . . . . . . . . 2
Other Precautions . . . . . . . . . . . . . . . . . . .2
Two-Line Display . . . . . . . . . . . . . . . . . . .3
Preparing to Use the Calculator . . . . . . . .4
Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Input Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Error Correction When Entering . . . . . . . . . . . . . . 6
Recalling a Previous Calculation . . . . . . . . . . . . . 6
Error Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Multi-statement . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Exponent Display Format . . . . . . . . . . . . . . . . . . . 7
Decimal Point and Separator . . . . . . . . . . . . . . . . 8
Initializing the Calculator. . . . . . . . . . . . . . . . . . . . 8
Basic Calculations. . . . . . . . . . . . . . . . . . .8
Arithmetic Operations . . . . . . . . . . . . . . . . . . . . . 8
Calculations with Fractions. . . . . . . . . . . . . . . . . . 9
Converting Between Decimal and Fractional
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Calculating Percentages. . . . . . . . . . . . . . . . . . . 11
Calculations Involving Degrees, Minutes,
and Seconds. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
FIX, SCI, RND . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Calculations Involving the Memory . . . . .14
Ans Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Continuous Calculation. . . . . . . . . . . . . . . . . . . . 14
Variable M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Variables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Scientific Functions . . . . . . . . . . . . . . . .16
Trigonometric and Inverse Trigonometric Functions. . 16
Table of contents

ii
Hyperbolic and Inverse Hyperbolic Functions . . 17
Common Logarithms, Natural Logarithms
and Antilogarithms . . . . . . . . . . . . . . . . . . . . . . . 17
Square Root, Cube Root, Root, Square Cube,
Reciprocal, Factoral, Random Number,
Circumference Ratio (π), Permutation and
Combination . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Converting Angular Measurements . . . . . . . . . . 19
Coordinate Systems (Pol (), Rec ()) . . . . . . . . . . 19
Expressing Numbers in Engineering Format . . . 20
Statistics . . . . . . . . . . . . . . . . . . . . . . . . .20
Standard Deviation-SD . . . . . . . . . . . . . . . . . . . 20
Data Entry Hints . . . . . . . . . . . . . . . . . . . . . . . . . 22
Regression-REG . . . . . . . . . . . . . . . . . . . . . . . . 23
Linear Regression . . . . . . . . . . . . . . . . . . . . . . . 25
Logarithmic, Exponential, Mathematical Power
and Inverse Regression . . . . . . . . . . . . . . . . . . . 26
Quadratic Regression. . . . . . . . . . . . . . . . . . . . . 27
Data Entry Hints . . . . . . . . . . . . . . . . . . . . . . . . . 28
Technical Data . . . . . . . . . . . . . . . . . . . .29
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 29
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . 29
Input Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Sequence of Operations. . . . . . . . . . . . . . . . . . . 33
Stack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Automatic Power-Saver . . . . . . . . . . . . . . . . . . . 36
Replacing the Battery . . . . . . . . . . . . . . . . . . . . . 36
Specifications . . . . . . . . . . . . . . . . . . . . .37
Regulatory Notices . . . . . . . . . . . . . . . . .38
European Union Regulatory Notice . . . . . . . . . . 38
Japanese Notice. . . . . . . . . . . . . . . . . . . . . . . . . 39
Korean Notice Class B . . . . . . . . . . . . . . . . . . . . 39
Perchlorate Material . . . . . . . . . . . . . . . . . . . . . . 39
Disposal of Waste Equipment . . . . . . . . . . . . . . 39
Chemical Substances. . . . . . . . . . . . . . . . . . . . . 40
China RoHS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

1
Using the Protective Case
1. Before using the calculator, slide the unit out of the
protective case as shown in step 1.
2.
After using the calculator, slide the unit out of the
cover as shown in step 2. To use the protective
case, slide it over the keyboard side of the unit.
Safety Precautions
Before using the calculator, please read the following
safety precautions carefully. Keep this manual handy
so that you can refer to it when needed.
The representations of the display and the keys in this
manual are for explanatory purposes only and may
not exactly match what you see on the calculator.
Notice
This symbol indicates that there is a risk of injury or
damage if the specified safety precautions are
ignored.

2
Battery
• Keep battery out of reach of children. If a battery is
swallowed, seek urgent medical advice.
• Do not charge, attempt to disable, short circuit, or
apply heat to the battery.
• When installing a new battery, orient it such that the
positive sign is facing upwards.
• Use only the battery specified in this manual.
Disposing of the Calculator
• Do not dispose of this calculator in an incinerator. It
might explode and cause injury or fire.
Other Precautions
• Before using this calculator for the first time, press
the key.
• The battery may lose some charge between the
time the calculator leaves the factory and the time
when it is purchased. Thus the original battery may
not last as long as a new battery.
• When battery power is very low, the calculator’s
memory may become corrupted or be lost
completely. To avoid loss of important information,
keep a copy of it elsewhere.
• Avoid storing or using the calculator under extreme
conditions.
Low temperature will slow the calculator's
response time, cause the display to appear
incomplete, and shorten the life of the battery. In
addition, do not directly expose the calculator to
the sun or place near a heater. High temperature

3
may cause the casing to fade, distort the casing, or
damage the internal circuitry.
• Avoid storing or using the calculator in damp
conditions or when there is high humidity or
excessive dust. Doing so will damage the internal
circuitry.
• Do not drop the calculator or allow it to be
subjected to extreme force.
• Do not twist, bend or otherwise distort the
calculator.
• Note: Carrying the calculator in a pocket could
cause it to twist or bend.
• Do not use a pen or other pointed object to press
the calculator’s keys.
• Use a soft, dry cloth to clean the calculator.
Opening the calculator casing voids the warranty.
If the calculator is very dirty, a neutral household
cleanser diluted in water can be used to clean it.
Dip a cloth in the solution and wring it out before
applying it to the calculator. Do not use benzine, a
diluting agent or any other volatile solvent to clean
the calculator. Doing so may damage the casing
and the keys.
Two-Line Display
The calculator shows both the expression being
calculated and the result of the calculation. These
appear in a two-line display.
• The expression being calculated is shown on the
upper line.
• The result is shown on the lower line.

4
If the result has more than three digits, a separator
appears before each group of three digits.
Preparing to Use the Calculator
Modes
Choose the appropriate mode before performing a
calculation.
• Press the key to display each settings screen
in turn. Each settings screen is described later in
this guide.
• Throughout this manual, the mode setting required
for each type of calculation is given when the
calculation is explained.
Type of Calculation Operation Calculation mode
Basic Calculation COMP
Standard Deviation SD
Calculation using
Regression
REG

5
Notes:
• To return the calculator to its default settings, as
indicated below press (Mode) in
that order. The default settings are:
Calculation mode: COMP
Angle unit: Deg
Exponent display format: Norm 2
Fraction display: a b/c
Decimal point character: Dot
• The mode indicator appears in the upper part of the
display.
• Before calculating, check the current mode setting
(COMP, REG, or SD) and the angle unit (Deg, Rad,
or Grad).
Input Limit
• The memory of the calculator can accommodate 79
steps in any one calculation. When you press a
number key or an arithmetic operator key (,
, , ), it occupies on step. Pressing or
does not occupy a step. So pressing ,
for example, takes up only one step.
• When you input the 73rd set of any calculation, the
cursor changes from “_” to “” to alert you to the
fact that the capacity of the memory is almost used
up. If what you want to input contains more than 79
steps, separate the calculation into two or more
smaller calculations and then combine them as you
go.
•Press
to recall the previous result, which can
then be used in the next calculation. Please see
the section on Key Memory for more information
about the key.

6
Error Correction When Entering
•Pressor to move the cursor to the position
needed.
•Press
to delete the digit or function at the
position of the cursor.
• Press the keys to activate the insertion
cursor . Whatever you insert now will appear at
the cursor’s current position.
• Press the key to return the cursor to its
normal functioning.
Recalling a Previous Calculation
• Each calculation and its result is kept in memory.
Press to recall the previous calculation and its
results. Press the key again to recall the next
previous calculation, and so on.
• When a previous calculation is recalled, you can
activate editing mode by pressing or .
• After any calculation, the calculation can be edited
by pressing or immediately.
• Pressing does not clear the calculation
memory. Therefore, when you press again, the
previous calculations are still available.
• The capacity of the calculation memory to store
expressions and calculation results is 128 bytes.
• The calculation memory is cleared if the:
-key is pressed
-(or ) are pressed (which
initializes the calculator)
- calculation mode is changed
- power supply is turned off

7
Error Indicator
If an error occurs, press or . The calculation
reappears and the cursor is located where the error is.
Multi-statement
A multi-statement is an expression consisting of two
or more smaller expressions. The expressions are
separated by a colon (:).
Exponent Display Format
The calculator can display up to 10 digits. Values
needing more than 10 digits will automatically be
displayed in exponent notation. Two exponent formats
are available.
• To change the display format, press repeatedly
until the appropriate settings screen appears.
• For an exponent setting, press . In the settings
screen that appears, press to choose Norm 1
or to choose Norm 2.
•Norm1
Exponent notation is applied automatically to any
number whose absolute value is greater than or
equal to 10 10 or less than 10-2.
•Norm2
Exponent notation is applied automatically to any
number whose absolute value is greater than or
equal to 1010 or less than 10-9.
• In this manual, results are expressed in Norm 1
format.
Fix
1
Sci
2
Norm
3

8
Decimal Point and Separator
The display setting (Disp) screen is used to specify
the required decimal mark and the character to use
before groups of three digits.
• To change these settings, press repeatedly
until the settings screen appears.
•Press
to display the settings screen.
• Press the number key (or ) corresponding
to the setting you want:
(Dot): Decimal point and comma separator
(Comma): Decimal comma and point separator
Initializing the Calculator
• To initialize the calculator (which clears the memory
and all variables, and resets all modes to their
default settings) press: (ALL) 
Basic Calculations
Arithmetic Operations
• When raising negative values to powers, make
sure that the negative sign is inside the
parentheses around the value. Please see the
section “Sequence of Operations” on page 33 for
more information.
Disp
1
To perform a basic calculation, select COMP mode
by pressing .
COMP............................................................

9
• A negative exponent does not need to be in
parentheses.
sin 4.56 ✕ 10-8 4.56 8
•Example1:3✕(4 ✕10-7) = 1.2 ✕10-6
347
•Example2:2✕(3 ✕4) = 14
234
• You can omit the at the end of an expression if
the next key you press is .
Calculations with Fractions
• A value is automatically displayed in decimal
format if the total number of digits of the fraction
(integer + numerator + denominator + semicolon)
is greater than 10.
•Example1:
•Example2:
•Example3:
69
•Example4: + 1.8 = 2.05
141.8 
• A calculation involving a fraction and a decimal
generally yields a decimal result.
1325 11˼15
312
234 6˼1˼4
1
3
---2
5
---
+11
15
------
=
31
2
---23
4
---
+61
4
---
=
6
9
---2
3
---
=
1
4
---

10
Converting Between Decimal and Fractional Display
Converting Between Mixed and Improper Fractions
•Example:2 ↔
• To change the fraction display format, press 
repeatedly until the following screen appears.
•Press
to display the settings screen.
• Example 1: 3.25 ↔3 3.25 3.25
(Decimal ↔Fraction) 3˼1˼4
13˼4
•Example2: ↔0.2
(Fraction ↔Decimal) 1 5 1˼5
0.2
1˼5
2 3 4 2˼3˼4
11˼4
2˼3˼4
Disp
1
1
4
---
1
5
---
3
4
---
11
4
------

11
• Press the number key (or ) corresponding
to the setting required:
(a b/c) : Mixed fraction
(d/c) : Improper fraction
• If you choose the d/c display format and enter a
mixed fraction, an error will occur.
Calculating Percentages
About Calculating Percentages
• Example 1: Calculate 15% of 1000? (150)
1000 15 
• Example 2: What percentage of 440 is 330? (75%)
330 440 
• Example 3: 1000 plus 15%? (1150)
1000 15 
• Example 4: 1000 minus 15%? (850)
1000 15 
• Example 5: If the original weight of a sample is
400g and a further 100g is added to it, what is the
new weight as a percentage of the old weight?
(125%)
100 400 
• Example 6: If the temperature increases from 60ºC
to 66ºC, what is the percentage increase? What is
it when the temperature increases to 69ºC?
(10%, 15%)
66 60 9 

12
Calculations Involving Degrees, Minutes,
and Seconds
You can convert between sexagesimal and decimal
numbers.
• Example 1: Convert the decimal number 1.234 to
its sexagesimal equivalent and then back to a
decimal number again.
• Example 2: Calculate 12º 34’ 56” ✕7.89
FIX, SCI, RND
• To change the display format settings, press 
repeatedly until the screen below appears.
• Press the number key (, , or )
corresponding to the setting you want to change.
(Fix): To set the number of decimal places
(Sci): To set the number of significant digits
(Norm): To set the display format to normal
• Example 1: 100 ÷ 3 ✕15
(Now specify that you want numbers displayed with
3 decimal places.)
1.234 1.234
1º 14º 2.4
1.234
12 34 56 7.89 99º16º25.44
Fix
1
Sci
2
Norm
3
100 3 15 500.
··· ··· (Fix) Fix
500.000

13
(Note that only the display precision gets fixed to 3
digits. The calculations are still performed with the
complete number.)
(Note that you can also force the calculator to
round a number to the number of decimal places
you have specified.)
•Press  ··· ···  (Norm)  to cancel the settings.
•Example2:2÷ 3
Display the result with two significant digits (Sci 2)
 ··· ··· (Sci) 
You can also display result in 10 significant digits
(Sci 10) using (Sci) 
•Press ··· ··· (Norm) to cancel settings.
100 3 33.333
15 500.000
100 3 33.333
(Internally Rounded) 33.333
15 499.995
2 3 SCI
6.7 x 10 -01

14
Calculations Involving the Memory
Ans Memory
• The Ans memory is updated with each new
calculation when you press .
• It is also updated when you press , , 
or after a letter (A to F, or M, X, or Y.)
• Pressing recalls the contents of the Ans
memory.
• The Ans memory can only store one value at a
time.
• The Ans memory is not updated if an error occurs
when you use any of the above mentioned keys for
a calculation.
Continuous Calculation
• The result currently displayed can be used as the
first value in the next calculation. Simply press an
operator key. Ans appears on the screen,
indicating that the last answer obtained is to be
used in the calculation.
• The previous result can also be used by the
following functions: ( 2, 3, -1, !, DRG),+,-,
^xy, x√, ✕, ÷, nr
,or nr .
To perform a calculation involving the memory, press
to enter COMP mode.
COMP............................................................
x
x
x
x
P
C

15
Variable M
• You can use the variable M to compute
accumulated totals which can be put into the
variable M directly, or they can also be added to or
subtracted from the number stored in variable M.
• To clear all the numerical values in the separate
variable M, press (M+)
Variables
• There are 9 variables. A to F, M, X, and Y. These
are used for storing data, constants, calculation
results, and other numerical values.
• To clear a single variable, store zero into it. For
example, . This clears variable A.
• To clear the values of all variables, press 
(Mcl) .
•Example:
1234 ÷ 20 = 61.7
1234 ÷ 25 = 49.36
1234 20 
25 
12 + 3 = 15 12 (M=)
45 - 6 = 39 45 6 
- 38 x 2 = 76 38 2 
(Total) -22 (M+)

16
Scientific Functions
• Some scientific calculations may take longer than
other types of calculations.
• You can start the next calculation after the after the
calculation result displays on screen.
•π= 3.14159265359
Trigonometric and Inverse Trigonometric
Functions
• To change the current angle units (degrees,
radians, or grads), press repeatedly until the
following screen appears.
• Now press the number key (, , or )
corresponding to the angle unit you want to use.
(Note that 90°= radians = 100 grads)
• Example 1: sin12°34’ 56” = 0.217840422
⋅⋅⋅ ⋅⋅⋅ (Deg) 12 34 56 
• Example 2: cos( rad) = 0.5
⋅⋅⋅ ⋅⋅⋅ (Rad) 3 
•Example3:cos
-1 =0.25π(rad)(= (rad))
⋅⋅⋅ ⋅⋅⋅ (Rad)
 2 2 
•Example4:tan
-1 0.789 = 38.27343992
⋅⋅⋅ ⋅⋅⋅ (Deg) 0.789 
To perform a scientific calculation, press to
enter COMP mode.
COMP........................................................
Deg
1
Rad
2
Gra
3
π
2
---
π
3
---
2
2
-------
π
4
---