# What is the frequency of f(theta)= sin 7 t - cos 2 t ?

$2 \pi \mathmr{and} {360}^{\circ}$
The period of sin t is $2 \pi \mathmr{and} {360}^{\circ}$
The period of sin 7t is $2 \frac{\pi}{7}$ or $\frac{360}{7}$
The period of cos 2t is $2 \frac{\pi}{2} = \pi \mathmr{and} {180}^{\circ}$
$\frac{360}{7}$ and $180$. It is $2 \pi \mathmr{and} {360}^{\circ}$