Using Your Calculator
How to use the TI-83+/TI-84+ built-in functions to solve math problems. Step-by-step procedures with detailed answers. It includes General Info, Algebra 1 & 2, Trigonometry, Statistics 1 & 2, PreCalculus & Calculus.

If you are doing math and don't have a TI Programmable Calculator, you are at a disadvantage.
Texas Instruments TI-83 Plus Graphing Calculator; 64 H x 96mm W Screen