For the Simple Harmonic Motion Described by the Trigonometric Function $d = \frac { 1 } { 16 } \cos 12 \pi t$

Multiple Choice

For the simple harmonic motion described by the trigonometric function, find the frequency per second. $d = \frac { 1 } { 16 } \cos 12 \pi t$

A) 16
B) $\pi$
C) 12
D) 2 $\pi$
E) 6