Use the Formula For $\sin ( x + y )$ To Simplify the Expression

Multiple Choice

Use the formula for $\sin ( x + y )$ to simplify the expression $\sin \left( t + \frac { 17 \pi } { 2 } \right)$ .

A) $\cos t - 17 \pi$
B) $\cos t + 17 \pi$
C) $\frac { \cos t } { 17 \pi }$
D) $17 \pi \cos t$
E) $\cos t$