TeX Quellcode:

{z_0 \; = \; \sqrt{\dfrac{1}{49}}\left(\cos\left(\dfrac{\frac{2\pi}{3}+2 \cdot 0\cdot \pi}{2}\right)+i \sin\left(\dfrac{\frac{2\pi}{3}+2 \cdot 0\cdot \pi}{2}\right)\right) \; = \; \dfrac{1}{7}\left(\cos\left(\dfrac{\pi}{3}\right)+i \sin\left(\dfrac{\pi}{3}\right)\right) }