Differentiate the Given Function $f ( t ) = \sin 6 t - \cos 4 t$

Multiple Choice

Differentiate the given function. $f ( t ) = \sin 6 t - \cos 4 t$

A) $6 \sin 6 t - 4 \cos 4 t$
B) $6 \cos 6 t + 4 \sin 4 t$
C) $- 6 \cos 6 t + 4 \sin 4 t$
D) $\cos 6 t - \sin 4 t$