Texas Instruments TI-89 Manual Book page 24

To enter a function:
1. Press Á, if you want the function to be re-evaluated.
2. Press 2 ˆ (TI-89) or ˆ to display a list of some
commonly used spreadsheet functions and select the
function.
— or —
Select a function from the Catalog or Math menu.
— or —
Press a function key.
3. Enter the argument(s) for the function, and then press
Í.
The following section describes the functions available from the
ˆ
Funcs
TI-89 / TI-92 Plus / Voyage™ 200 PLT CellSheet™ App
menu.
Page 24