Question

Question 14:
Single correct
14. cos(A - B) =
1) sin A cos B + cos A sin B 2) sin A cos B - cos A sin B
3) cos A cos B + sin A sin B 4) cos A cos B - sin A sin B
1)
2)
3)
SAVE & NEXT
SAVE & MARK FOR RE​

Answer 1

Answer:

I think correct answer is D)