Rewrite with Only Sin X and Cos X $\sin 3 x + \cos 3 x$

Rewrite with only sin x and cos x.
- $\sin 3 x + \cos 3 x$

A) $2 \cos ^ { 2 } x \sin x + \sin x - 2 \sin ^ { 3 } x + \cos x - 4 \cos x \sin ^ { 2 } x$
B) $2 \sin x \cos ^ { 2 } x + \cos x + 1 - \sin ^ { 2 } x + \cos x$
C) $\sin x \cos ^ { 2 } x - \sin ^ { 3 } x + \cos ^ { 3 } x - \sin ^ { 2 } x \cos x$
D) $2 \sin x \cos ^ { 2 } x + \sin ^ { 3 } x - \cos ^ { 3 } x - 2 \sin ^ { 2 } x \cos x$

Correct Answer:

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