Answer
A polar equation is an equation that is represented by the use of variables $r\,\text{ and }\,\theta $.
Work Step by Step
Suppose the two polar equations are expressed as below:
$\begin{align}
& r=2\cos \theta \\
& r=1+2\sin \theta \\
\end{align}$
where $r\,\text{ and }\,\theta $ are varibles.
