Complete the Identity $$\cos ( 4 \theta ) = \text { ? }$$

Multiple Choice

Complete the identity.
- $$\cos ( 4 \theta ) = \text { ? }$$

A) $3 \sin \theta - 4 \sin ^ { 3 } \theta$
B) $\cos ^ { 4 } \theta - 6 \sin ^ { 2 } \theta \cos ^ { 2 } \theta + \sin ^ { 4 } \theta$
C) $4 \sin \theta \cos ^ { 3 } \theta - 4 \sin ^ { 3 } \theta \cos \theta$
D) $\cos ^ { 3 } \theta - 3 \sin ^ { 2 } \theta \cos \theta$