Evaluate `Delta=|0sinalpha-cosalpha-sinalpha0sinbetacosalpha-sinbeta0|`

Explanation

To evaluate the determinant

\[
\Delta = \begin{vmatrix}
0 & \sin \alpha \\
-\cos \alpha & -\sin \alpha \\
\sin \beta & \cos \alpha \\
-\sin \beta & 0
...