TeX Quellcode:

{\varphi = \arccos \left(\dfrac{-\frac{5}{6} \cdot 3 + \sqrt{8} \cdot \left(-\sqrt{2}\right) + 0 \cdot 5^3}{\sqrt{\left(-\frac{5}{6}\right)^2+\left(\sqrt{8}\right)^2+0^2} \cdot \sqrt{3^2+ \left(-\sqrt{2}\right)^2+\left(5^3\right)^2}} \right) = \arccos \left(\dfrac{-\frac{13}{2}}{\sqrt{\frac{313}{36}} \cdot \sqrt{15.636}} \right) \approx 91{,}01^{\circ}}