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Texas Instruments TI-81 User Manual

Texas Instruments TI-81
193 pages
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TI-81
Guidebook
10”
7.5”

Table of Contents

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Texas Instruments TI-81 Specifications

General IconGeneral
TypeGraphing Calculator
Memory2.4 KB RAM
ProcessorZilog Z80, 2 MHz
ProgrammingTI-BASIC
Power Source4 AAA batteries
Release Year1990
DisplayMonochrome LCD, 96 x 64 pixels

Summary

Defining Parametric Graphs

Steps in Defining a Graph

Outlines the four basic steps for defining a graph, with procedures detailed.

Setting Graph Modes

Explains how to select modes for parametric equations for optimal graphing.

Displaying Parametric Equation Components

Shows how to view and enter X and Y components for parametric equations.

Entering Parametric Equation Components

Guides on entering X and Y components for a new parametric equation.

Parametric Graphing: Selection and Range

Selecting Parametric Equations

Details how to select specific parametric equations for graphing.

Setting Range Variables

Explains setting RANGE variables like Tmin, Tmax, and Tstep for graphing.

Defining Matrices

Selecting a Matrix for Definition

Explains how to select a matrix (A, B, or C) to define.

Setting Matrix Dimensions

Guides on accepting or changing matrix dimensions (rows and columns).

Matrix Elements: Entry and Editing

Entering Matrix Elements

Details the process of entering values into matrix elements.

Editing Matrix Elements

Explains how to edit existing matrix elements.

Matrix Row Operations

RowSwap Function

Explains the RowSwap function for swapping rows in a matrix.

Swapping Rows Example

Provides an example of using RowSwap to swap rows in a matrix.

Matrix Row Arithmetic

Row + Function

Explains the Row + function for adding rows in a matrix.

*Row Function

Explains the *Row function for scalar multiplication of matrix rows.

*Row + Function

Explains the *Row + function for adding scaled rows to another row.

Matrix Element Storage

Storing Matrix Elements

Details storing a value to a specific matrix element.

Using Matrix Elements in Expressions

Explains how to use matrix elements as variables in expressions.

Matrix Dimension Storage

Storing Matrix Dimension Variables

Details storing matrix dimension variables (e.g., number of rows).

Using Matrix Dimension Variables in Expressions

Explains using matrix dimension variables in expressions.

Chapter 7: Performing Statistical Calculations

The STAT (Statistical) Menus

Introduces the STAT menus for statistical analysis operations.

STAT Menu Functions

STAT Menu Overview

Lists and describes functions available in the STAT menus (CALC, DRAW, DATA).

Setting Up Statistical Analysis

Statistical Data Input

Explains how to enter and manage statistical data.

Entering and Editing Statistical Data

Entering New Data Sets

Guides on entering new sets of statistical data.

Editing Existing Statistical Data

Explains how to edit existing statistical data points.

One-Variable Statistics Calculation

Two-Variable Statistics Calculation

Calculating Results

Explains how to calculate regression models and results.

Accessing Statistical Variables

One-Variable Statistical Results

Explains the variables available for one-variable statistics.

Two-Variable Statistical Results

Explains the variables available for two-variable statistics.

Displaying Statistical Variables

Using Statistical Variables in Expressions

Explains how to use statistical variables within mathematical expressions.

Drawing Statistical Data

Data Plotting Preparation

Steps before plotting statistical data, including range and function selection.

Plotting Statistical Data

Details the process of plotting statistical data using various graph types.

Chapter 8: Programming

The PRGM (Program) Menus

Introduces the PRGM menus for program execution, editing, and erasing.

PRGM Menu Functions

PRGM Menu Overview

Lists and describes functions available in the PRGM menus (EXEC, EDIT, ERASE).

Entering Programs

Selecting a Program for Entry

Explains how to select a program to enter or edit.

Editing Programs

Executing Programs

Control Instructions for Programs

Program Control Instructions

Input/Output Instructions

Calling Programs from Other Programs

Setting Modes within Programs

Chapter 9: Applications

Solving Systems of Linear Equations

Explains using matrix arithmetic to solve systems of linear equations.

Solving Linear Equations with Matrices

Solving Nonlinear Equations Graphically

Graphing Piecewise Functions

Graphical Statistical Analysis

Maximum Volume of an Open Box

Simulating Motion with Parametric Equations

Graphing the Inverse of a Relation

Unit Circle and Trigonometric Curves

Program: Numerical Solve Routine

Program: Numerical Integration

Program: Table of Function Values

Program: Plotting the Derivative

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