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fx-991CW
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Casio fx-991CW User Manual
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Contents
Table of Contents
Bookmarks
Table of Contents
Table of Contents
Before Using the Calculator
Read this First
About this Manual
Key Operations
Menu Operations
Key and Key
Examples
Initializing the Calculator
Calculator "Get Started" Screen
Precautions
Safety Precautions
Handling Precautions
Getting Started
Attaching and Removing the Front Cover
Turning Power on and off
HOME Screen
Adjusting Display Contrast
Key Markings
Indicators
Using Menus
Calculator Apps and Menus
Calculator Apps
Selecting a Calculator App
Installed Calculator App List
Using the SETTINGS Menu
Changing Calculator Settings
Items and Available Setting Options
Using the CATALOG Menu
Using the TOOLS Menu
Inputting Expressions and Values
Basic Input Rules
Inputting an Expression Using Natural Textbook Format (Mathi/Matho or Mathi/Decimalo Only)
Undo Operations
Using Values and Expressions as Arguments
Overwrite Input Mode (Linei/Lineo or Linei/Decimalo Only)
Basic Calculations
Arithmetic Calculations
Fraction Calculations
Powers, Power Roots, and Reciprocals
Pi, Natural Logarithm Base E
Natural Logarithm Base E
Calculation History and Replay
Calculation History
Replay
Using Memory Functions
Answer Memory (Ans)
Variables (A, B, C, D, E, F, X, Y, Z)
Clearing the Contents of All Memories
Changing Calculation Result Format
Using the FORMAT Menu
FORMAT Menu List
Conversion Sample Operation
Standard and Decimal Conversion
Prime Factorization
Rectangular and Polar Coordinate Conversion
Improper Fraction and Mixed Fraction Conversion
Engineering Notation
Sexagesimal Conversion (Degree, Minute, Second Calculations)
Converting a Decimal Value Calculation Result to a Sexagesimal Value
Inputting and Calculating with a Sexagesimal Value
Advanced Calculations
Function Analysis
Derivative(D/DX)
Integration(∫)
Summation(Σ)
Logarithm(Logab), Logarithm(Log)
Natural Logarithm
Probability
Factorial(!)
Permutation(P), Combination(C)
Random Number
Random Integer
Numeric Calculations
Absolute Value
Round off
Angle Unit, Polar/Rectangular Coordinate, Sexagesimal
Degrees, Radians, Gradians
Rect to Polar, Polar to Rect
Degrees, Minutes, Seconds
Hyperbolic, Trigonometric
Hyperbolic Functions
Trigonometric Functions
Engineering Symbols
Scientific Constants
Unit Conversions
Others
Registering and Using Defining Equations for F(X) and G(X)
Registering a Defining Equation
Performing a Calculation by Assigning a Value to the Registered Defining Equation
Registering a Composite Function
Data Retention
Using QR Code Functions
Displaying a QR Code
If You Experience Difficulty Scanning a QR Code
Using Calculator Apps
Statistical Calculations
General Procedure for Performing a Statistical Calculation
Inputting Data with Statistics Editor
Displaying Statistical Calculation Results
Using Statistical Calculation Screen
Statistical Calculation Formula
Distribution Calculations
General Procedure for Performing a Distribution Calculation
Parameter List
List Screen
Editing the List Screen Contents
Calculation Example
Using Spreadsheet
Inputting and Editing Cell Contents
Inputting a Constant and Formula into a Cell
Cell Relative and Absolute References
Using Spreadsheet App Special Commands
Batch Inputting the same Formula or Constant into Multiple Cells
Spreadsheet App Setting Items
Auto Calc and Recalculate
Creating a Number Table
General Procedure for Creating a Number Table
Maximum Number of Rows in a Number Table According to Table Type
Defining Equation Registration
Editing Number Table Screen Data
F(X) and G(X) Update Timing
Data Retention
Equation Calculations
Simultaneous Linear Equations
High-Order Equations from 2Nd to 4Th Degree
Using Solver
Inequality Calculations
General Procedure for Performing an Inequality Calculation
Complex Number Calculations
Inputting Complex Numbers
Complex App Calculation Examples
Base-N Calculations
Specifying the Number Mode of a Particular Input Value
Converting a Calculation Result to Another Type of Value
Logical and Negation Operations
Matrix Calculations
General Procedure for Performing a Matrix Calculation
Matrix Variable List Screen
Matrix Answer Memory (Matans)
Matrix Calculation Examples
Vector Calculations
General Procedure for Performing a Vector Calculation
Vector Variable List Screen
Vector Answer Memory (Vctans)
Vector Calculation Examples
Ratio Calculations
General Procedure for Performing a Ratio Calculation
Calculation Example
Using Math Box
Dice Roll
Coin Toss
Technical Information
Errors
Displaying the Location of an Error
Error Messages
Before Assuming Malfunction of the Calculator
Replacing the Battery
Calculation Priority Sequence
Calculation Ranges, Number of Digits, and Precision
Calculation Range and Precision
Function Calculation Input Ranges and Precision
Specifications
Frequently Asked Questions
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fx-570CW
fx-991CW
User's Guide
CASIO Worldwide Education Website
https://edu.casio.com
Manuals are available in multi languages at
https://world.casio.com/manual/calc/
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