Evaluate the Expression $$\cos 8 \alpha$$ A) $\cos ^ { 4 } 4 \alpha + \sin ^ { 4 } 4 \alpha$

Multiple Choice

Evaluate the expression. $$\cos 8 \alpha$$

A) $\cos ^ { 4 } 4 \alpha + \sin ^ { 4 } 4 \alpha$
B) $\cos ^ { 2 } 4 \alpha - \sin ^ { 2 } 4 \alpha$
C) $\cos ^ { 2 } 4 \alpha + \sin ^ { 2 } 4 \alpha$
D) $\cos ^ { 4 } 4 \alpha - \sin ^ { 2 } 4 \alpha$
E) $\cos ^ { 4 } 4 \alpha - \sin ^ { 4 } 4 \alpha$