[<< wikibooks] High School Trigonometry/Trigonometric Identities
Fundamental Identities
Verifying Identities
Sum and Difference Identities for Cosine
Sum and Difference Identities for Sine and Tangent
Double-Angle Identities
Half-Angle Identities
Product-and-Sum, Sum-and-Product, and Linear Combinations of Identities
Trigonometric Identities ExercisesThis material was adapted from the original CK-12 book that can be found here. This work is licensed under the Creative Commons Attribution-Share Alike 3.0 United States License