Trigonometric Identities

Sine Angle Sum The identity for \(sin(a+b)\) is:

\[\sin(a+b)=\sin(a)\cos(b)+\cos(a)\sin(b)\]

Cosine Angle Sum The identity for \(cos(a+b)\) is:

\[\cos(a+b)=\cos(a)\cos(b)−\sin(a)\sin(b)\]