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### TI-84 Plus Calculator's Math NUM Submenu

The Math NUM submenu houses several functions, including the absolute value function, the greatest-integer function, and the **min** and **max** functions. To access the Math NUM submenu, press the [more…]

### Convert Degrees to Radians with the TI-84 Plus Calculator

The functions housed in the TI-84-Plus calculator's Angle menu allow you to convert between degrees and radians or from radians to degrees. To convert degrees to radians, follow these steps: [more…]

### Convert between Degrees and DMS with the TI-84 Plus Calculator

The functions housed in the TI-84 Plus calculator's Angle menu allow you to convert between degrees and DMS (degrees, minutes, and seconds) and between DMS and degrees. You can also override the angle [more…]

### TI-84 Plus Keyboard Basics

The row of keys under the calculator screen on the TI-84 Plus keyboard contains the keys you use when graphing. The next three rows, for the most part, contain editing keys, menu keys, and arrow keys. [more…]

### Edit Entries on the TI-84 Plus Calculator

The TI-84 Plus graphing calculator offers four ways to edit an entry: deleting the entire entry, erasing part of the entry, inserting characters, and keying over existing characters. [more…]

### TI-84 Plus Graphing Calculator Menus

Most TI-84 Plus graphing functions and commands you use are found in the menus housed in the calculator. To get the most out of your calculator, you need to know how to find and select menu items. [more…]

### Evaluate Arithmetic Expressions with the TI-84 Plus Calculator

Arithmetic expressions are evaluated on the TI-84 Plus calculator's Home screen. The Home screen is the screen you see when you turn the calculator on. If the Home screen is not already displayed on the [more…]

### TI-84 Plus Calculator Keys to Access Functions

Starting with the fifth row of the TI-84 Plus calculator, you find the functions commonly used on a scientific calculator. Here’s what they are and how you use them: [more…]

### Order of Operations and the TI-84 Plus Calculator

The order in which the TI-84 Plus calculator performs operations is the standard order that you are all used to. Spelled out in detail, here is the order in which the calculator performs operations: [more…]

### TI-84 Plus Calculator's Math MATH Submenu

Press **[MATH]** to access the Math MATH submenu on the TI-84 Plus calculator. This submenu contains general mathematical functions you can insert into an expression. [more…]

### TI-84 Plus Calculator's Equation Solver

The TI-84 Plus graphing calculator Equation Solver solves an equation for one variable given the values of the other variables in the equation. The Solver is capable of dealing only with real numbers and [more…]

### Define Solution Bounds in TI-84's Equation Solver

The **bound** variable at the bottom of the Equation Solver screen is where you enter the bounds of the interval containing the solution you’re seeking with the TI-84 Plus graphing calculator. The default [more…]

### Input Commands for the TI-84 Plus

The **Input** and **Prompt** commands are used in a program on the TI-84 Plus calculator to solicit information from the program user. The **Input** command asks the user for the value of only one variable and allows [more…]

### How and When to Clear the TI-84 Plus Home Screen

Because programs display their output on the TI-84 Plus Home screen, it is a good idea to have your program clear the Home screen before the output is displayed. This is done by inserting the [more…]

### The Disp and Output Commands for TI-84 Plus Programs

The **Disp** and **Output** commands are used by a program to display text messages and values. The **Disp** command is capable of displaying more than one piece of information, and the [more…]

### Set the Mode on Your TI-84 Plus Calculator

The Mode menu, which is accessed by pressing z, is the most important menu on the TI-84 Plus calculator; it tells the calculator how you want numbers and graphs to be displayed. [more…]

### The TI-84 Plus Calculator Catalog

The Ti-84 Plus calculator’s Catalog houses every command and function used by the calculator. However, it’s easier to use the keyboard and the menus to access these commands and functions than it is to [more…]

### Recycle Previous Answers and Entries with the TI-84 Plus Calculator

One of the benefits of using the TI-84 Plus calculator is that it has a better memory than you do. You can use the previous answer in the next arithmetic expression you want to evaluate, and you can reuse [more…]

### Store Variables with the TI-84 Plus Calculator

If you plan to use the same number many times when evaluating arithmetic expressions with the TI-84 Plus calculator, consider storing that number in a variable. To do so, follow these steps: [more…]

### Math Menu Functions on the TI-84 Plus Calculator

Most functions housed in the TI-84 Plus calculator's Math menu require that the argument be entered after entering the function. Such functions are easily recognizable by the parenthesis following the [more…]

### Enter an Equation in TI-84 Plus Equation Solver

The second step of solving an equation in the TI-84 Plus graphing calculator's Equation Solver is to enter or edit the equation to be solved. The first step is to set the mode. To enter a new equation [more…]

### Find Multiple Solutions with the TI-84 Plus

To find multiple solutions to an equation in the TI-84 Plus Equation Solver, you first need to find one solution to the equation. Place the cursor anywhere in the line that contains the variable you’re [more…]

### How to Stop and Pause a Program on the TI-84 Plus

To stop a program on the TI-84 Plus graphing calculator while the program is executing, press **[ON]**. You are then confronted with the ERR: BREAK error message that gives you the option to [more…]

### Improvements to the TI-84 Plus

Many of the changes to the TI-84 Plus are a direct result of feedback received from teachers and students. After all, Texas Instruments is committed to providing the best tools for the teaching and learning [more…]

### How to Charge the TI-84 Plus C's Battery

The TI-84 Plus C uses a Li–ion battery, similar to the one in your cellphone, which holds a charge for up to two weeks. Texas Instruments (TI) recommends charging your battery for at least four hours for [more…]