Polar Form of Complex Number/Examples/2 cis 5 pi 4^-1

Example of Polar Form of Complex Number
The complex number $\polar {2, \dfrac {5 \pi} 4}$ can be expressed in Cartesian form as:
 * $2 \cis \dfrac {5 \pi} 4 = -\sqrt 2 - \sqrt 2 i$

and depicted in the complex plane as:


 * 2 cis 5 pi 4^-1.png