Question

sinθ=sin((1)/(2))θcos((1)/(2))θ?

Answer 1

can u draw ur equation ? too many brackets there :P

Answer 2

\[\sinθ= \sin\left(\dfrac{(1)}{(2)}\right)\theta \cos\left(\dfrac{(1)}{(2)}\right)\theta\]
It makes no sense, so no. It's not true.