Question

27. If A=B=60º, verify that
(i) cos (A - B) = cos A cos B + sin A sin B
(ii) sin (A - B) = sin A cos B - cos A sin B
(iii) tan (A - B) =
tan A - tan B
1 + tan A tan B​

Answer 1

Step-by-step explanation:

This is the answer,simply put values and refer trignometric table