# What is the Cartesian form of (0,pi)?

The Cartesian form of $\left(0 , \pi\right)$ is $\left(0 , 0\right)$.
Given polar coordinates $\left(r , \theta\right)$, the corresponding Cartesian coordinates are $\left(r \cos \theta , r \sin \theta\right)$. Therefore, the Cartesian coordinates of $\left(0 , \pi\right)$ are $\left(0 \cos \pi , 0 \sin \pi\right) = \left(0 , 0\right)$