Answer
If $\theta \max =\pi $, the graph is drawn once.
Work Step by Step
The above plot is for $\theta =\pi .$
From the plot, it can be observed that from $\theta =0\,\text{to}\,\theta \text{=}\pi $, the curve is plotted exactly once. Beyond $\theta =\pi $, the curve retracts its path again.
