Library > Math > Trigonometry

Trigonometric Identities--A Clever Way to Prove

1998
This is a great trigonometry tutorial, put together by a team of young mathematicians. A nice help section explains the site's navigation controls. Much of the text can also be heard since an audio player option is provided. All the necessary formulas and equations that you should know in order to master trigonometry are explained. The extensively used bulletin board allows visitors to pose trig questions and get help when they're stuck.