Complex Numbers in Sets

$z=a+ib$
$z=r(\cos \theta +i\sin \theta )$
$z=r{e}^{i\theta }$

Operations

Multiplying Vectors

$z_1\times z_2=(r_1\times r_2)(\cos ({\theta }_1+\theta 2)+i\sin ({\theta }_1+{\theta }_2))$