Trig without Tears: Contents

1 min read Original article ↗

or, How to Remember Trigonometric Identities

Copyright � 1997�2025 by Stan Brown, BrownMath.com

Summary: Faced with the large number of trigonometric identities, students tend to try to memorize them all. That way lies disaster. When you memorize a formula by rote, you have no way to know whether you�re remembering it correctly. I believe it is much more effective (and, in the long run, much easier) to understand thoroughly how the trig functions work, memorize half a dozen formulas, and work out the rest as needed. That�s what these pages show you how to do.