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### 10 Common TI-84 Plus Error Messages

Following is a list of ten common error messages the TI-84 Plus calculator may give you. When you get an error, pay close attention to the error message screen. Your calculator displays a descriptive note [more…]

### Create and Save Calculator Programs on the TI-84 Plus

The programming language used by the TI-84 Plus calculator is similar to the Basic programming language. It uses the standard commands (such as the “If …, then …, else …” command) that are familiar to [more…]

### Input Commands for the TI-84 Plus

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

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

The **Disp** and **Output** commands on the TI-84 Plus 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…]

### Use a Program to Display a Graph on the TI-84 Plus

You can use a program to display graphs on your TI-84 Plus calculator. In the program in this example, the **PlotsOff**command turns off all stat plots and the [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…]

### How to Use a Program to Write Text on the TI-84 Plus

The **Disp** and **Output** commands on the TI-84 Plus calculator are used to get a program to display text on the Home screen. Because each line of the Home screen can accommodate up to 26 characters, the wise [more…]

### Change the Color and Graph Style of a TI-84 Plus Function

With the TI-84 Plus C calculator, you can change the color as well as the graph style of functions on the TI-84 Plus. In this program, the **GraphStyle(***function* [more…]

### How to Change the Color of Text on a TI-84 Plus Graph

With the TI-84 Plus C calculator, you can change the color of the text displayed on graphs. In this program, the **TextColor(***color#*) command can be used to set the color of the text prior to using the Text [more…]

### 3 Decision Commands on the TI-84 Plus

The Ti-84 Plus calculator can handle three decision commands (**If**, **If . . . Then . . . End**, and **If . . . Then . . . Else . . . End**). Here is how to use these commands in a program. [more…]

### The While . . . End Command on the TI-84 Plus

The TI-84 Plus calculator can handle three looping commands. The structure of the **While . . . End** command appears in the first screen. If the condition following the [more…]

### The Repeat . . . End and For . . . End Commands on the TI-84

The TI-84 Plus calculator can handle three looping commands (**While . . . End**, **Repeat . . . End**, and **For . . . End**). The **While . . . End** and **Repeat . . . End** [more…]

### How to Graph Polar Equations on Your TI-84 Plus

After you have set the window and entered the polar equation, graphing the equations on your TI-84 Plus is easy. Before you press [GRAPH], make sure you watch the direction as your graph is created. If [more…]

### How to Enter and Store Matrices on the TI-84 Plus

You can enter and store matrices on your TI-84 Plus calculator. A *matrix* is a rectangular array of numbers arranged in rows and columns. The dimensions, r x c, of a matrix are defined by the number of [more…]

### Matrix Arithmetic on the TI-84 Plus Calculator

You can use your TI-84 Plus calculator to perform matrix arithmetic. When evaluating arithmetic expressions that involve matrices, you usually want to perform the following basic operations: scalar multiplication [more…]

### Evaluate the Determinant and Other Matrix Operations on the TI-84 Plus

Quite a few operations are unique to matrices. All the matrix-specific operations on the TI-84 Plus calculator are found by accessing the MATRX MATH Operations menu [more…]

### How to Solve a System of Equations on the TI-84 Plus

Matrices are the perfect tool for solving systems of equations (the larger the better). Fortunately, you can work with matrices on your TI-84 Plus. All you need to do is decide which method you want to [more…]

### How to Work with Fractions on the TI-84 Plus

There’s no fraction key on the TI-84 Plus calculator, per se, but many fraction tools are built into this calculator. For starters, isn’t a fraction just division in disguise? So, pressing / between two [more…]

### How to Work with Complex Numbers on the TI-84 Plus

Fortunately, your TI-84 Plus calculator knows how to handle complex numbers. Complex numbers are of the form *a* + *b*** i**, where

*a*is the real part and

*b*is the imaginary part. [more…]

### How to Use the CMPLX Menu on the TI-84 Plus

Your TI-84 Plus calculator has a CMPLX menu of functions designed to accomplish just about any task you need to when working with complex numbers.

The functions most often used with complex numbers are [more…]

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

The functions housed in the Angle menu on your TI-84 Plus calculator enable you to convert between degrees and radians or convert between rectangular and polar coordinates. To convert degrees to radians [more…]

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

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

### How to Use the Test Menu on the TI-84 Plus

The often overlooked Test menu on the TI-84 Plus enables you to use your calculator in creative ways to solve problems. Do you want to do better on your next standardized test? Some of these tips just [more…]

### How to Enter Parametric Equations in the TI-84 Plus

You can enter and then graph parametric equations in your TI-84 Plus calculator. Parametric equations are used in Pre-calculus and Physics classes as a convenient way to define [more…]

### How to Graph Parametric Equations on the TI-84 Plus

Anything that can be graphed in Function mode on the TI-84 Plus an also be graphed as a set of parametric equations. Using parametric equations enables you to investigate horizontal distance, [more…]