Question

If alpha = beta = 60° then prone
that cos (alpha - beta) = cos alpha case bets
+ Sin alpha sin beta​

Answer 1

Step-by-step explanation:

For all value of `alpha,beta,gamma` prove that ,`cosalpha. play. 3:31 · If `cosalpha+ cosbeta+cosgamma=0=sinalpha+sinbeta+ singamma`. play. 7:14 ... If `alpha+beta= 60^0`, prove that `cos^. play.