TeX Quellcode:

\begin{array}{rclcl} \tan(\beta) &=& \dfrac{b}{a} & \vert & \cdot a \cr b &=& a \cdot \tan(\beta) \cr b &=& 9{,}3 \cdot \tan(36^{\circ}) \cr b & \approx & 6{,}76 \, cm \end{array}