Parametric Functions Practice Test

A point on a wheel follows $r}(t)=\langle 3\cos(2t),,3\sin(2t)\rangle$ (meters); determine the coordinates at $t=\pi/4$.

A rotating arm follows $\vec{r}(t)=\langle 3\cos(\omega t),,3\sin(\omega t)\rangle$; what does increasing $\omega$ change?