Question

@AZ more healp?

Answer 1

First one can go to
(2sinx)^2 = 1

Answer 2

@darkknight

Answer 3

@angle

Answer 4

uhh no

divide 4 on both sides

\(\sin^2 x = \dfrac{1}{4}\)

and then use

\(\sin \theta = \dfrac{1- \cos (2\theta)}{2}\)