Interestingly enough, the trigonometric functions that define those relationships are also closely tied to circles. Needless to say, this makes trig one of the hardest topics in math for students ...

Ask any professor, and they’ll probably tell you graphing calculators offer a plethora of mathematical uses, like plotting graphs, inputting trigonometric functions — you know, typical ...

The TI-83 graphing calculator is great as a standard calculator, but also great for statistics and trigonometry. Graph and compare functions, and perform data plotting and analysis.