TeX Quellcode:

\begin{array}{rclcl} \sin(\alpha) &=& \dfrac{a}{c} & \vert & \cdot c \cr a &=& c \cdot \sin(\alpha) \cr a &\approx& 6{,}97 \cdot \sin \left( \dfrac{11 \pi}{36} \right) \cr a & \approx & 5{,}71 \, cm \end{array}