TI83 Plus Math Menu Functions
Press [MATH] to accesses the Math menu on the TI83 Plus graphing calculator. This menu contains four submenus: MATH, NUM, CPX, and PRB. Use the
keys to get from one submenu to the next, and back again.
The Math MATH submenu contains the general mathematical functions such as the cubed root function. It also contains the calculator’s Equation Solver that, as you would expect, is used to solve equations. The Math NUM submenu contains the functions usually associated with numbers, such as the least common multiple function.
The Math CPX submenu contains functions normally used with complex numbers. The Math PRB submenu contains the probability and randomnumber functions.
How to use TI83 Plus Math menu functions
Most functions housed in the Math menu require that the argument be entered after entering the function. Such functions are easily recognizable by the parenthesis following the name of the function; the cuberoot function,
is an example. With one exception, functions in the Math menu that have no parenthesis at the end of their names require that the argument be entered before the function is entered. The cube function is an example of such a function. (The exception is the xth root function,
This function requires that the root be entered first, then the
function, and then the argument.)
How to insert a TI83 Plus Math menu function
Math menu functions are usually inserted into arithmetic expressions entered on the Home screen, or into definitions of functions in the Y= editor. Pressing [2nd][MODE] puts you in the Home screen, and pressing [Y=] puts you in the Y= editor. The Y= editor is used to define functions you want to graph.
To insert a Math menu function into an expression, follow these steps:

If necessary, use
to place the cursor where you want to insert the function.

Press [MATH].

Use
to select the appropriate submenu of the Math menu.

Enter the number of the function or use
to highlight the number of the function and then press [ENTER].

If necessary, complete the expression.