If #sin 2theta = 2sinthetacostheta#, what is #sin 50theta#?

1 Answer
Dec 7, 2017

#sin50theta=2sin25thetacos25theta#

Explanation:

The formula you've been given is a way of basically dividing the thing inside the #sin# by 2, and half of #50# is #25#, so instead of #2sinthetacostheta#, its #2sin25thetacos25theta#

PS: If you wanted to get this in terms of #sintheta# and #costheta#, you either have to:
1. Have knowledge of complex numbers and De Moivre's Theorem or if not,
2. Have wayyyyyy too much time on your hands