(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

sin(4x) = 8cos^{3}(x)sin(x)-4sin(x)cos(x)

2. Relevant equations

All trigonometric identities

3. The attempt at a solution

I can simplify the right side using the double angle identity to:

sin(4x) = 4sin(2x)cos^{2}(x)-2sin(2x)

However, now I'm not sure what to do. Did I take a step in the wrong direction?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Verifying an Identity

**Physics Forums | Science Articles, Homework Help, Discussion**