TeX Quellcode:

\begin{array}{rcl} z_4 &=& \sqrt[3]{8}\left(\cos\left(\dfrac{0+2\cdot 4\cdot\pi}{3}\right)+i\sin\left(\dfrac{0+2\cdot 4\cdot\pi}{3}\right)\right) \\ \\ &=& 2\left(\cos\left(\dfrac{8\pi}{3}\right)+i\sin\left(\dfrac{8\pi}{3}\right)\right) \\ \\ &=& 2\left(\cos\left(\dfrac{2\pi}{3}\right)+i\sin\left(\dfrac{2\pi}{3}\right)\right) \\ \\ &=& z_1\end{array}