How are you supposed to sketch this type of polar graph?
Are you supposed to somehow relate this to $\cos\phi+i\sin\phi$ but can polar graphs even have an imaginary axis?!
I am thinking that you relate it to $\cos\phi+i\sin\phi$ because $x=r\cos\phi$ and $y=r\sin\phi$.
I have also sketched the graph plotting each point individually $\phi= 0, \frac{\pi}{6}, \frac{\pi}{3}, \frac{\pi}{2}, \pi. $ $r=1,0.35,0.12,0.04...$ But seems to plot the Cartesian graph. If you want to see the answer on the mark scheme it is here Q4(i) page 24.
Hint: note that the distance from the point $P=(r,\phi)$ to the origin, that is, the value of $r$, varies with the angle $\phi$.
So when the point circle around the origin its distance varies also.