The TI-89 is a graphing calculator used in advanced mathematics classes and approved for use on examinations like the Scholastic Aptitude Test and various Advanced Placement tests. While its large ...

I had to give back a loaned TI-83+ in June, and I purchased a TI-89 to replace it. I've figured out how to do most things, except these two which are really annoying me:1. Cubic and higher roots ...

Statistically speaking, if you’ve held a graphing calculator, it was probably made by Texas Instruments. The TI-89 Titanium continues this legacy with more memory, more pre-installed ...