Roots of Complex Number/Exponential Form

Theorem
Let $z := r e^{i \theta}$ be a complex number expressed in exponential form, such that $z \ne 0$.

Let $n \in \Z_{>0}$ be a (strictly) positive integer.

Then the $n$th roots of $z$ are given by:
 * $z^{1 / n} = \left\{{r^{1 / n} e^{i \left({\theta + 2 \pi k}\right) / n}: k \in \left\{{0, 1, 2, \ldots, n-1}\right\}}\right\}$