Question

Show by an example that
cos A – cos B ≠ cos (A – B)

Answer 1

Answer:

Step by step explaination:

Let, A=60°

B=30°

cos60°-cos30°=cos(60-30)

1/2-√3/2=cos30

-0. 36=√3/2

so,cos A – cos B ≠ cos (A – B)