Question

Cota.sin2a=1+cos2a, prove that

Answer 1

Answer:

Step-by-step explanation:

LHS : Cot a * sin 2a

Cos a/ sin a* sin 2a

Cos a/ sin a* 2 sin a cos a ( as sin 2a=2 sin a cos a)

2cos^2 a

RHS : 1 + cos 2a

1+ 2 cos^ 2 a -1 ( as cos 2a= 2cos ^ 2-1)

2 cos^2

LHS= RHS