$\text { Find the derivative of the function } y = 8 \sin 5 x \text {. }$

Multiple Choice

$\text { Find the derivative of the function } y = 8 \sin 5 x \text {. }$

A) $y ^ { t } = 40 \sin 5 x$
B) $y ^ { t} = 40 \cos 5 x$
C) $y ^ { t } = - 8 \sin 5 x$
D) $y ^ {t } = - 40 \cos 5 x$
E) $y ^ { t } = 8 \cos 5 x$