sin(α+β)=sinαcosβ+cosαsinβ

cos(α+β)=cosαcosβ-sinαsinβ

tan(A+B)=(tan A+tan B)/( 1-tan A * tan B)

Differential angle formula:

sin(α-β)=sinαcosβ-cosαsinβ

cos(α-β)=cosαcosβ+sinαsinβ

Tan (A-B)= (Tan A-Tan B)/( 1+ Tan A * Tan B)