1.

2cosA.cosB = (A) cos(A + B) + cos(A – B) (B) 2cosA.sinB (C) cos(A – B) – cos(A + B) (D) 2sinA.cosB

Answer»

Correct option is: (A) cos(A + B) + cos(A – B)



Discussion

No Comment Found

Related InterviewSolutions