Question

What is $Z$ in polar coordinates?

Answer 1

Meaning of $Z$ in polar coordinate system:

In the polar coordinate system, $Z$ represents the complex number.

The polar representation of a complex number $Z=x+iy$ is,

$Z=r{e}^{i\theta }$ , where $r=\sqrt{x^2+y^2}$ and $\theta ={\tan }^{-1}\left(\frac{y}{x}\right)$