Use Identities to Write the Expression as a Single Function $\sin ( x + 2 \pi )$

Use identities to write the expression as a single function of x or θ.
- $\sin ( x + 2 \pi )$

A) $\frac { \sqrt { 2 } } { 2 } \cos x + \frac { \sqrt { 2 } } { 2 } \sin x$
B) $- \cos x$
C) $\sin x$
D) $\frac { \sqrt { 2 } } { 2 } \cos x - \frac { \sqrt { 2 } } { 2 } \sin x$

Correct Answer:

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