Curated OER
Identities and Trigonometric Values
Students solve trigonometric equations. In this precalculus lesson, students prove trigonometric identities using the Pythagorean Theorem. They apply the addition formulas for sine and cosine to prove different identities.
Windstream
Ojk's Pre Calculus Study Page
This online tutorial explains different topics in pre-calculus. Offers helpful information to explain different concepts. Good for review.