Physics
OpenStudy (anonymous):

For the simple harmonic motion equation d=5sin((pi/4)t), what is the frequency? If necessary, use the slash (/) to denote a fraction.

OpenStudy (anonymous):

is frequency same as period? then it is (2pi)/(pi/4)

OpenStudy (anonymous):

that will actually be 8 period is 8 maybe frequency is 1/8?

OpenStudy (kropot72):

$d=5\sin \frac{\pi}{4}t=5\sin 2\pi ft$ Therefore: $2\pi f=\frac{\pi}{4}$ $f=\frac{\pi}{4}\times \frac{1}{2\pi}=\frac{1}{8}Hz$

OpenStudy (anonymous):

The equation in the question can be rewritten as$d=5\sin 2\pi ft$ where 2pi f is called the angular frequency for a SHM. $\frac{\pi}{4}=2\pi f$