Find the Derivative of the Function $y = 2 \cos 5 x$

Multiple Choice

Find the derivative of the function. $y = 2 \cos 5 x$

A) $y ^ { \prime } = - 10 \sin 5 x$
B) $y ^ { \prime } = 10 \sin 5 x$
C) $y ^ { \prime } = - 2 \sin 5 x$
D) $y ^ { \prime } = - 10 \cos 5 x$
E) $y ^ { \prime } = - 5 \sin 5 x$