Use the Product Rule to Differentiate $f ( t ) = t ^ { - 3 } \cos t$

Multiple Choice

Use the Product Rule to differentiate. $f ( t ) = t ^ { - 3 } \cos t$

A) $f ( t ) = - t ^ { - 3 } \sin t + 3 t ^ { - 4 } \cos t$
B) $f ^ { t } ( t ) = 3 t ^ { - 2 } \cos t - t ^ { - 3 } \sin t$
C) $f ^ { t } ( t ) = t ^ { - 3 } \sin t - 3 t ^ { - 4 } \cos t$
D) $f ^ {t } ( t ) = - t ^ { - 3 } \sin t - 3 t ^ { - 4 } \cos t$
E) $f ^ { t } ( t ) = - t ^ { - 3 } \sin t + 3 t ^ { - 4 } \sin t$