Use the Power-Reducing Formulas
- $8 \cos ^ { 2 } x$

Multiple Choice

Use the Power-Reducing Formulas
- $8 \cos ^ { 2 } x$

A) $4 + 4 \cos 2 x$
B) $4 - 4 \cos 2 x$
C) $1 + \cos 2 x$
D) $16 \cos x$