Answer
$y=\sqrt 3x$
line passing the pole with an angle of $\frac{\pi}{3}$ to the polar axis.
See graph.
Work Step by Step
1. Use the formula $tan\theta=\frac{y}{x}$, we have $\theta=\frac{\pi}{3}\rightarrow \frac{y}{x}=tan\frac{\pi}{3}=\sqrt 3$, or $y=\sqrt 3x$
2. We can identify the above equation as a line passing the pole with an angle of $\frac{\pi}{3}$ to the polar axis.
3. See graph.
