Question

Find the exact value by using a half-angle identity.

cosine of five pi divided by twelve.

Answer 1

Answer:

$\frac{ \cos(\pi) }{12}$

I'm solving it by putting into 3 significant figures:

$\cos(\pi) = 0.998 \\ \frac{0.998}{12} = 0.08$

Good luck!

Intelligent Muslim,

From Uzbekistan.