# Prove using trig identites

## 1 Answer

\[\sin x = 2 \cos(\frac{x}{2})\sin (\frac{x}{2})=2 \cos(\frac{x}{2})[2 \cos(\frac{x}{4})\sin (\frac{x}{4}) ]\]

\[=4 \cos(\frac{x}{2}) \cos(\frac{x}{4})\sin (\frac{x}{4}).\]

Savionf

455

Join Matchmaticians Affiliate Marketing
Program to earn up to 50% commission on every question your affiliated users ask or answer.

- 1 Answer
- 85 views
- Pro Bono

### Related Questions

- Is $\int_0^1 \frac{\cos x}{x \sin^2 x}dx$ divergent or convergent?
- Find the area under the graph of $y=\sin x$ between $x=0$ and $x=\pi$.
- Gear - Wing Spar Linkage
- Evaluate$\int \sqrt{\tan x}dx$
- Calculating aspect ratio limits of rotated rectangle within a rectangle
- Help deriving an equation from geometry and vectors
- Trigonometry Word Problems
- Simplify this expression