Question

Question #bc7b6

Answer 1

Develop the right side:
`RS = ((2sin x)/(cos x))/(1 + (sin^2 x/cos^2 x))`
`RS = ((2sinx)/(cos x))/((cos^2 x + sin^2 x)/(cos^2 x))`
`RS = ((2sin x)/(cos x))((cos^2 x)/1) = 2sin x.cos x = sin 2x`. Proved