If cos alpha beta 3 2 July 8, 2019 16 32 64 128 If cos alpha plus cos beta 3 2 If cos alpha 2 cos beta 3 cos gamma 0 If cos alpha cos beta 3 2 sinalpha sinbeta 1 2 If sin alpha 3 2 cos beta 3 2 If cos alpha =- 3 5 and sin beta 7 25 If cos(alpha + beta) = 0 then sin(alpha - beta) can be reduced to Cos alpha + beta
