Identities and Proof — Daniel Judge

This is material that reviews the addition and subtraction formulas.

This is material that reviews the double angle formulas.

This is material that reviews how to use the addition formulas to express a sum of sines and cosines as a single sine.

This is material that is deigned to demonstrate the art of Proof by showing that the left hand side is equal to the right handsie.

This is material that reviews the half angle formulas.

This is material that reviews how to reduce the powers for sine and cosine functions.