Simplify the Expression Algebraically $$3 \sin \left( \frac { \pi } { 2 } - x \right)$$

Multiple Choice

Simplify the expression algebraically.​ $$3 \sin \left( \frac { \pi } { 2 } - x \right)$$ ​

A) $\frac { 1 } { 3 } \cos x$
B) $3 \cos x$
C) $- \frac { 1 } { 3 } \cos x$
D) $- 3 \cos x$
E) $3 \sin x$