Last Activity: 7 Years ago
We know the formula of 2 cosA cosB = cos(A+B) + cos(A-B)Put this formula here,We get,Cos(pi/2) + cos (2theta)0+ cos 2thetaCos 2thetaHence proved
Prepraring for the competition made easy just by live online class.
Full Live Access
Study Material
Live Doubts Solving
Daily Class Assignments
Last Activity: 2 Years ago
Last Activity: 3 Years ago