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### TI-83 Plus Keyboard Basics

The row of keys under the calculator screen on the TI-83 Plus contains the keys you use when graphing. The next three rows, for the most part, contain editing keys, menu keys, and arrow keys. The arrow [more…]

### How to Edit Entries on the TI-83 Plus

The TI-83 Plus graphing calculator offers four ways to edit an entry — deleting the entire entry, erasing a portion of an entry, inserting characters, and keying over existing characters. [more…]

### How to Use Menus on the TI-83 Plus

Most functions and commands you use are found in the menus housed in the TI-83 Plus graphing calculator. Each menu has its own key or key combination. For example, to access the Math menu, press [more…]

### How to Set the Mode on the TI-83 Plus

The TI-83 Plus Mode menu, which is accessed by pressing **[MODE]**, is the most important menu on the calculator; it tells the calculator how you want numbers and graphs to be displayed. [more…]

### How to Use the TI-83 Plus Catalog

The TI-83 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…]

### Enter and Evaluate Expressions on the TI-83 Plus

Arithmetic expressions are evaluated on the TI-83 Plus 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 calculator, [more…]

### Use Previous Answers and Recycle the Last Entry

On the TI-83 Plus graphing calculator, you can use the previous answer in the next arithmetic expression you want to evaluate. If that answer is to appear at the beginning of the arithmetic expression, [more…]

### How to Store Variables on the TI-83 Plus

If you plan to use the same number many times when evaluating arithmetic expressions with the TI-83 Plus, consider storing that number in a variable. To do so, follow these steps: [more…]

### TI-83 Plus Math Menu Functions

Press **[MATH]** to accesses the Math menu on the TI-83 Plus graphing calculator. This menu contains four submenus: **MATH**, **NUM**, **CPX**, and **PRB**. Use the [more…]

### TI-83 Plus Math MATH Submenu

Press **[MENU]** to access the Math MATH submenu on the TI-83 Plus graphing calculator. This submenu contains general mathematical functions you can insert into an expression. [more…]

### The TI-83 Plus Math NUM Submenu

The Math NUM submenu on the TI-83 Plus graphing calculator offers several functions —**abs**, **round**, **iPart** and **fPart**, **int, min** and **max**, and **lcm** and **gcd**. To access the Math NUM submenu, press [more…]

### How to Convert Degrees to Radians on TI-83 Plus

The functions housed in the Angle menu on the TI-83 Plus graphing calculator allow you to convert between degrees and radians and from radians to degrees. To convert degrees to radians, follow these steps [more…]

### How to Convert between Degrees and DMS

On the TI-83 Plus graphing calculator, you can use the functions housed in the Angle menu to convert between rectangular and polar coordinates. They also allow you to convert between degrees and DMS [more…]

### Set the Mode and Use Complex Numbers on TI-83 Plus

On the TI-83 Plus graphing calculator, you can set the mode and use complex numbers. The second from the last line of the Mode menu gives you three options: [more…]

### The Math CPX Submenu on the TI-83 Plus

The Math CPX submenu on the TI-83 Plus graphing calculator contains the standard functions used with complex numbers. You can insert a Math menu function into an expression. [more…]

### Enter or Edit Equations in TI-83 Plus Equation Solver

The first step in using the Equation Solver on the TI-83 Plus graphing calculator is to set the Mode for real-number arithmetic. Because the Equation Solver is equipped to deal only with real numbers, [more…]

### Assign Values to Variables in TI-83 Plus Equation Solver

After you have entered an equation in the Equation Solver on the TI-83 Plus graphing calculator, the values assigned to the variables in your equation are the values that are currently stored in those [more…]

### Guess a Solution and Solve the Equation

When using the TI-83 Plus graphing calculator's Equation Solver, you need to guess at a solution by assigning a value to the variable you’re solving for. Any value in the interval defined by the [more…]

### Find the Best Interest Rate on the TI-83 Plus

You can use the TI-83 Plus graphing calculator to determine the best interest rate. When *nominal rates* (also called *annual percentage rates*) are compounded at different frequencies [more…]

### Leasing versus Borrowing with the TI-83 Plus

You can use the TI-83 Plus graphing calculator to determine whether leasing is a better deal than borrowing. Suppose that you’re planning to purchase a [more…]

### How to Find the Fifth Variable with the TVM Solver

The **TVM** (time-value-of-money) **Solver** on the TI-83 Plus graphing calculator can be used to answer questions like What are your monthly mortgage payments? . In fact, if you tell the [more…]

### Find Principal, Interest, and Balance with TVM Solver

You can use the TVM Solver on the TI-83 Plus graphing calculator to find the principal and interest paid on a loan and then to determine the balance on that loan. Use the [more…]

### Use the TVM Solver to Reach Financial Goals

You can use the The **TVM** (time-value-of-money) **Solver** on the TI-83 Plus graphing calculator to determine how long to leave money in a savings or investment account to reach a specified financial goal. Here [more…]

### How to Find the Value of Money with TVM Solver

You can use the TVM Solver on the TI-83 graphing calculator to find the future and the present value of money. In the context of a savings or investment account, the future value of your money is the amount [more…]

### Error Messages on the TI-83 Plus

When working on the TI-83 Plus graphing calculator, you are likely to encounter the following common error messages if you make mistakes when entering equations, formulas, or data. [more…]