Casio fx-82AU PLUS II Owner's Manual

fx-82AU PLUS II

User’s Guide

CASIO Worldwide Education Website

http://edu.casio.com

CASIO EDUCATIONAL FORUM

http://edu.casio.com/forum/

RJA528034-001V01

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 ............................................... 10

Basic Calculations ................................................................ 10

Prime Factorization ...............................................................14

Function Calculations ........................................................... 14

Statistical Calculations (STAT) ............................................. 17

Using VERIFY (VERIF) ........................................................... 20

Calculation Ranges, Number of Digits,

and Precision ......................................................................... 22

Errors ...................................................................................... 24

Before Assuming Malfunction of the Calculator... ............. 25

Replacing the Battery ............................................................ 25

Specifications ........................................................................ 26

Frequently Asked Questions ................................................ 26

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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 B, b, v, and V 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.

!9(CLR) 3(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.

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• Never try to take the calculator apart.

• 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 O to turn on the calculator. Press 1A(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 O key to turn the calculator back on.

Adjusting Display Contrast

Display the CONTRAST screen by performing the following key operation: 1N(SETUP)c5(]CONT' ). Next, use d and e to adjust contrast. After the setting is the way you want, press A.

Important: If adjusting display contrast does not improve display readability, it probably means that battery power is low. Replace the battery.

Key Markings

Alternate function

Pressing the 1 or S 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.

Alternate function

–1

sin

Keycap function

If key marking text is this color:

Yellow

Red

It means this:

Press 1 and then the key to access the applicable function.

Press S and then the key to input the applicable variable, constant, or symbol.

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Reading the Display

The display of the calculator shows expressions you input, calculation results, and various indicators.

Input expression Indicators

Math

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 e and d to scroll the calculation result display.

• If a g indicator appears on the right side of the input expression, it means the displayed calculation continues to the right. Use e and d to scroll the input expression display. Note that if you want to scroll the input expression while both the ' and g indicators are displayed, you will need to press A first and then use e and d to scroll.

Display indicators

Math

This indicator:

STO

RCL

STAT

Means this:

The keypad has been shifted by pressing the 1 key. The keypad will unshift and this indicator will disappear when you press a key.

The alpha input mode has been entered by pressing the S key. The alpha input mode will be exited and this indicator will disappear when you press a key.

There is a value stored in independent memory.

The calculator is standing by for input of a variable name to assign a value to the variable. This indicator appears after you press 1t(STO).

The calculator is standing by for input of a variable name to recall the variable’s value. This indicator appears after you press t.

The calculator is in the STAT Mode.

The default angle unit is degrees.

The default angle unit is radians.

FIX

SCI

Math

Disp

The default angle unit is grads.

A fixed number of decimal places is in effect.

A fixed number of significant digits is in effect.

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.

The display currently shows an intermediate result of a multi-statement calculation.

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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.

Using Menus

Some of the calculator’s operations are performed using menus. Pressing N or w, 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 c and f to switch between menus.

• To close a menu without selecting anything, press A.

Specifying the Calculation Mode

When you want to perform this type of operation:

General calculations

Statistical and regression calculations

Verify a calculation

Note: The initial default calculation mode is the COMP Mode.

Perform this key operation:

N1(COMP) N2(STAT) N3(VERIF)

Configuring the Calculator Setup

First perform the following key operation to display the setup menu: 1N(SETUP). Next, use c and f and the number keys to configure the settings you want. Underlined ( ___ ) settings are initial defaults.

1MthIO 2LineIO 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.

MathMath

Note: • The calculator switches to Linear Display automatically whenever you enter the STAT Mode. • In this manual, the B symbol next to a sample operation indicates Natural Display (LineO), while the b symbol indicates Linear Display.

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3Deg 4Rad 5Gra Specifies degrees, radians or grads as the angle unit for value input and calculation result display.

Note: In this manual, the v symbol next to a sample operation indicates degrees, while the V symbol indicates radians.

6Fix 7Sci 8Norm 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: b 100 ÷ 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.

–1

Example: b 1 ÷ 7 = 1.4286 × 10

1.429 × 10

(Sci 5)

–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.

–2

Norm 1: 10

 | x |, | x |  10

Example: b 1 ÷ 200 = 5 × 10

Norm 2: 10

–3

(Norm 1)

–9

 | x |, | x |  10

0.005 (Norm 2)

c1ab/c c2 d/c Specifies either mixed fraction (ab/c) or improper fraction (d/c) for display of fractions in calculation results.

c3STAT 1ON ; 2OFF Specifies whether or not to display a FREQ (frequency) column in the STAT Mode Stat Editor.

c4Disp 1Dot ; 2Comma Specifies whether to display a dot or a comma for the calculation result decimal point. A dot is always displayed during input.

Note: When dot is selected as the decimal point, the separator for multiple results is a comma (,). When comma is selected, the separator is a semicolon (;).

c5]CONT ' Adjusts 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.

19(CLR) 1(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.

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4 × sin30 × (30 + 10 × 3) = 120 4 *s 30 )*( 30 + 10 * 3 )=

* *

MathMath

* 1 Input of the closing parenthesis is required for sin, sinh, and other functions

that include parentheses.

These multiplication symbols ( × ) 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), π or

The closing parenthesis immediately before the = operation can be

e .

omitted.

Input example omitting ** example.

and )* 3 operations in the above

MathMath

4 s 30 )( 30 + 10 * 3 =

Important: If you execute a calculation that includes both division and multiplication operations in which a multiplication sign has been omitted, parentheses will be inserted automatically as shown in the examples below.

• When a multiplication sign is omitted immediately before an open parenthesis or after a closed parenthesis.

6 ÷ 2 (1 + 2) p 6 ÷ (2 (1 + 2)) 6 ÷ A (1 + 2) p 6 ÷ (A (1 + 2)) 1 ÷ (2 + 3) sin(30) p 1 ÷ ((2 + 3) sin(30))

• When a multiplication sign is omitted immediately before a variable, a constant, etc.

6 ÷ 2π p 6 ÷ (2π)

2 ÷ 2'2 p 2 ÷ (2'2)

4π ÷ 2π p 4π ÷ (2π)

• When inputting a function that uses commas (such as Pol, Rec, and RanInt#), be sure to input the closed parentheses required by the expression. If you do not input closed parentheses, parentheses may not be inserted automatically as described above.

Important: If you execute a calculation in which a multiplication sign has been omitted immediately before a fraction (including mixed fractions), parentheses will be inserted automatically as shown in the examples below.

2 ×

' 1 c 3 dddd 2

: B

MathMath

sin(30) ×

: B

' 4 c 5 dddds 30 )

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MathMath

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 d and e to move the cursor. • When Linear Display is selected, pressing f will cause the cursor to jump to the beginning of the calculation, while c will jump to the end. • When Natural Display is selected, pressing e while the cursor is at the end of the input calculation will cause it to jump to the beginning, while pressing d while 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 13 bytes. • The cursor will change shape to k when 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

2nd

3rd

4th

Parenthetical expressions

Functions that require an argument to the right and a closing parenthesis “)” following the argument.

Functions that come after the input value ( %), powers (

x ^), roots ( ")

, x 3 , x

–1

, x !, °’ ”, °, r , g ,

Fractions

Negative sign (–) Note: When squaring a negative value (such as –2), the value being squared must be enclosed in parentheses ( (- 2 )w

has a higher priority than the negative sign,

5th

=). Since inputting - 2 w= would 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.

6th

STAT Mode estimated values ( m, n, m

, m2 )

7th Multiplication where the multiplication sign is omitted

8th Permutation ( n P r ), combination ( n C r )

9th

Multiplication, division ( × , ÷)

10th Addition, subtraction (+, –)

Inputting with Natural Display

Selecting Natural Display makes it possible to input and display fractions

and certain functions (

, x 3 , x ^, ), #, ", x

are written in your textbook.

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−1

, 10^, e^, Abs) just as they

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