Title: Trigonometry - Trigonometric Identities - General Addition

Authors: Justine Leon Uro (Author)
Licence: CC BY 4.0

sum of sine alpha cosine beta and sine beta cosine alpha

Okay!

sine alpha cosine beta less sine beta cosine alpha

Excellent!

cosine alpha cosine beta minus sine alpha sine beta

cosine alpha cosine beta plus sine alpha sine beta

quotient of quantity tangent alpha plus beta and quantity one minus tangent alpha tangent beta

quotient of quantity tangent alpha less beta and quantity one plus tangent alpha tangent beta