Question

beta2×sin2=1 find the answer ​

Answer 1

Step-by-step explanation:

S_in alpha = 4/5, alpha lies II and cos beta = 2/5, beta lies in Find cos (alpha - beta) = cos alpha cos beta + sin alpha sin beta sin (alpha - beta) = sin alpha cos beta - cos alpha sin beta sin 2 alpha = 2 sin alpha cos alpha cos 2 beta = 2 cos^2 beta - 1 tan 2 alpha = 2 tan alpha/1 - tan 2 alpha