TeX Quellcode:

\begin{array}{rclcl} \alpha &=& \arccos \left(\dfrac{b}{c}\right) \cr \alpha &=& \arccos \left(\dfrac{3}{7{,}5} \right) \cr \alpha & \approx & 1{,}16 \quad = \quad 66{,}4^\circ \end{array}