EasyManua.ls Logo

Casio fx-991ZA PLUS II User Manual

Casio fx-991ZA PLUS II
96 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Page #1 background imageLoading...
Page #1 background image
EN
https://edu.casio.com
CASIO Worldwide Education Website
https://world.casio.com/manual/calc/
Manuals are available in multi languages at
User’s Guide
(NATURAL-V.P.A.M.)
fx-991ZA PLUS II

Table of Contents

Question and Answer IconNeed help?

Do you have a question about the Casio fx-991ZA PLUS II and is the answer not in the manual?

Casio fx-991ZA PLUS II Specifications

General IconGeneral
TypeScientific Calculator
Number of Functions552
Equation SolverYes
Matrix CalculationsYes
Complex Number CalculationsYes
IntegrationYes
DifferentiationYes
Memory9 variables
Weight95 g
Protective CaseYes
DisplayNatural Textbook Display
Power SourceSolar and Battery

Summary

Before Using the Calculator

About this Manual

Introductory information about the user's guide content and disclaimers.

Initializing the Calculator

Procedure to reset the calculator to its default settings.

Precautions

Important safety and handling guidelines to prevent damage or misuse.

Calculation Modes and Calculator Setup

Calculation Mode

Explanation of how to select the appropriate calculation mode for different operations.

Inputting Expressions and Values

Basic Input Rules

Fundamental principles for entering calculations, including order of operations.

Basic Calculations

Toggling Calculation Results

How to switch between different forms (fraction/decimal, √/decimal) of calculation results.

Function Calculations

Pi (π), Natural Logarithm Base e

Explanation and usage of mathematical constants π and e.

Trigonometric Functions

How to perform calculations involving sine, cosine, and tangent.

Hyperbolic Functions

Instructions for using hyperbolic functions like sinh, cosh, and tanh.

Errors

Displaying the Location of an Error

How to navigate to the exact point of an error in a calculation.

Clearing the Error Message

Steps to clear error messages and return to the calculation screen.

Error Messages

Explains common error types like Math ERROR, Stack ERROR, and Syntax ERROR.

Before Assuming Malfunction of the Calculator...

Replacing the Battery

Steps for safely replacing the calculator's battery and important notes.

Calculation Ranges, Number of Digits, and Precision

Calculation Range and Precision

Details on the numerical limits and accuracy of calculations.

Specifications

Verifying the Authenticity of Your Calculator

Method to confirm if the calculator is a genuine CASIO product.

Frequently Asked Questions

How can I perform input and display results the same way I did on a model that does not have Natural Textbook Format?

Changing display settings to match older models without Natural Textbook Format.

How can I change a fraction form result to decimal form?

Procedure to convert fraction results to decimal form.

How can I return the calculator to its initial default settings?

Key operation to reset all calculator settings to their factory defaults.

Related product manuals