TeX Quellcode:

{ \dfrac{1}{8} \left(\cos\left(\dfrac{\pi}{4} \right)+i \sin\left(\dfrac{\pi}{4} \right) \right) \; \cdot \; \dfrac{12}{11} \left(\cos\left(\dfrac{2\pi}{5} \right)+i \sin\left(\dfrac{2\pi} {5} \right) \right) \; = \; \dfrac{1}{8} \cdot \dfrac{12}{11} \left(\cos\left(\dfrac{\pi}{4}+\dfrac{2\pi}{5} \right)+i \sin\left(\dfrac{\pi}{4}+\dfrac{2\pi}{5} \right) \right) \; = \; \dfrac{3}{22} \left(\cos\left(\dfrac{13\pi}{20}\right)+i \sin\left(\dfrac{13\pi}{20}\right)\right)}