Question

cos(a-b)=1 and cosb= root3/2 then a+b=?

Answer 1

I think the answer is 7 okay

Answer 2

Answer:

Cos(A-B) = 1

-> A-B = 0

-> A = B

CosB = ¬/3/2

-> B = 30°

Since A = B

A = 30°

A+B = 60°