Q5 of 123 Page 9

Prove the following identities:


Proof:


Take LHS



Identities used:


cos 2x = 2 cos2 x – 1


= 1 – 2 sin2 x


sin 2x = 2 sin x cos x


Therefore,







= tan x



= RHS


Hence Proved


More from this chapter

All 123 →
3

Prove the following identities:

 4

Prove the following identities:

 6

Prove the following identities:

 7

Prove the following identities: