Simplify the Expression Algebraically $$6 \sin \left( \frac { \pi } { 2 } + x \right)$$

Multiple Choice

Simplify the expression algebraically.​ $$6 \sin \left( \frac { \pi } { 2 } + x \right)$$ ​

A) $6 \cos x$
B) $- 6 \cos x$
C) $6 \sin x$
D) $- \frac { 1 } { 6 } \cos x$
E) $\frac { 1 } { 6 } \cos x$