Question

Find the polar form of the following complex numbers
$-1-i$

Answer 1

$z=-1-i$

$=\frac{\sqrt{2}}{\sqrt{2}}(-1-i)$

$=-\sqrt{2}(\frac{1}{\sqrt{2}}+\frac{i}{\sqrt{2}})$

$=-\sqrt{2}(\cos \frac{\pi }{4}+i\sin \frac{\pi }{4})$ is the polar form of the given comlex number.