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Casio fx-991ZA Plus User Manual

Casio fx-991ZA Plus
52 pages
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EN
fx-991ZA PLUS
Users Guide
CASIO Worldwide Education Website
http://edu.casio.com
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Casio fx-991ZA Plus Specifications

General IconGeneral
TypeScientific Calculator
Equation SolverYes
Matrix CalculationsYes
Complex Number CalculationsYes
Integration/DifferentiationYes
Weight95 g
DisplayNatural Textbook Display
Power SourceSolar + Battery
Dimensions77 x 165.5 mm
Memory9 variables

Summary

Important Information

Sample Operations

Explains how sample operations are indicated by an icon and default setup.

Initializing the Calculator

Procedure to reset the calculator mode and setup to initial defaults, clearing memory.

Safety and Handling Precautions

Warnings and precautions for battery safety, leakage, and general handling.

Basic Operations and Navigation

Removing Hard Case and Power Management

Instructions for removing the hard case and turning the calculator on/off.

Key Markings Explained

Explains the meaning of different colored key markings for accessing functions.

Display and Menu Usage

Reading the Display

Explains input expression, calculation results, and various display indicators.

Using Calculator Menus

How to navigate menus using number keys, indicators, and exiting menus.

Modes and Setup Configuration

Specifying Calculation Modes

Lists calculation modes (COMP, CMPLX, STAT, etc.) and their key operations.

Configuring Calculator Setup

Key operation to display setup menu and configure settings like display format.

Input and Initialization

Initializing Calculator Settings

Procedure to initialize calculator settings, returning mode and setup to defaults.

Inputting Expressions and Values

Basic rules for inputting expressions, priority sequence, and omitting multiplication signs.

Calculation Priority Sequence

Explains the priority sequence of operations: Parentheses, Functions, Powers/Roots, Fractions.

Advanced Input Techniques

Natural Display Input

How Natural Display allows input of fractions and functions as written in textbooks.

Using Values as Arguments

How to use previously input values or expressions as arguments for functions.

Input Modes and Expression Editing

Explains insert/overwrite modes and how to edit/clear expressions.

Calculation Results and Basic Calculations

Toggling Calculation Results

How to toggle calculation results between fraction, decimal, and π forms.

Fraction and Percent Calculations

Explains input methods for fractions and how to perform percentage calculations.

Advanced Calculation Features

Sexagesimal, Multi-Statements, Engineering Notation

Covers sexagesimal calculations, multi-statements, and engineering notation.

Calculation History and Memory

Explains how to scroll through history and use Answer/PreAns memory.

Memory Management

Preset Variables and Independent Memory

Details preset variables (A-Y) and independent memory (M) for storage.

Clearing All Memories and Prime Factorization

Procedure to clear all memories and how to perform prime factorization.

Function Calculations

Trigonometric, Hyperbolic, Exponential Functions

Covers trigonometric, hyperbolic, and exponential functions and their input.

Logarithmic, Power, and Integration Functions

Covers logarithmic, power functions, integration, and derivative.

Advanced Function Features

Coordinate Conversions and Other Functions

Covers Pol/Rec, factorial, Abs, Ran#, nPr, nCr, Rnd functions.

Integration/Differential Precautions

Precautions for integration and differential calculations, including mode and function limitations.

Function Calculation Examples

Examples for Various Functions

Provides examples for trigonometric, hyperbolic, exponential, and logarithmic functions.

Complex Number Calculations (CMPLX)

CMPLX Mode Examples and Format Control

Examples of complex number calculations and how to control result format.

CALC and SOLVE Functions

Using the CALC Function

How CALC saves expressions with variables for recall and execution.

Using the SOLVE Function

How SOLVE uses Newton's Law to approximate equation solutions.

Equation and Statistical Calculations

Equation Calculations (EQN)

How to select equation types and use the Coefficient Editor.

Statistical Calculations (STAT)

How to select calculation type and input data into the Stat Editor.

STAT Data Analysis

Obtaining Statistical Values and Regression

How to obtain statistical values, regression coefficients, and estimate values.

Normal Distribution Calculations

How to perform normal distribution calculations using the DISTr menu.

Base-n Calculations (BASE-N)

Number Modes and Input/Output Ranges

How to switch number modes and details on input/output ranges.

Specifying Input Mode and Converting Results

How to specify input mode and convert calculation results between number types.

Logical Operations

Logical Operators and Functions

How to use logical operators (AND, OR, XOR, XNOR) and negation functions.

Matrix Calculations (MATRIX)

Assigning Data and Matrix Examples

How to assign data to matrix variables and perform matrix operations.

Matrix Row Echelon Forms

How to obtain row echelon and reduced row echelon forms of matrices.

Creating a Number Table (TABLE)

Generating and Displaying Tables

Steps to generate a number table based on one or two functions.

Vector Calculations (VECTOR)

Assigning Data and Vector Examples

How to assign data to vector variables and perform vector operations.

Distribution Calculations (DIST)

Selecting Type and Input Variables

Lists distribution types and variables accepted for input.

List Screen and Calculation Examples

How to use the List Screen for data input and view calculation examples.

Scientific Constants

Inputting and Listing Constants

How to input scientific constants and a list of available constants.

Metric Conversion

Using and Listing Conversion Commands

How to use metric conversion commands and a list of available conversions.

Calculation Ranges and Precision

General Calculation Ranges and Precision

Information on calculation range, internal digits, and precision for general calculations.

Function Input Ranges and Precision

Input ranges and precision for trigonometric, hyperbolic, and other functions.

Errors

Displaying and Clearing Errors

How to display error location and clear error messages.

Error Messages and Causes

Lists common error messages (Math, Stack, Syntax, etc.) and their causes.

Troubleshooting and Maintenance

Before Assuming Malfunction

Steps to check expression, mode, and initialize calculator to resolve problems.

Replacing the Battery

Step-by-step instructions for turning off, replacing battery, and re-initializing.

Specifications and FAQs

Calculator Specifications

Details on power requirements, operating temperature, dimensions, and weight.

Frequently Asked Questions

Common user queries on display modes, memory types, and mode switching.

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