Evaluate `Delta=|[0,sinalpha,-cosalpha],[-sinalpha,0,sinbeta],[cosalpha,-sinbeta,0]|`

Explanation

To evaluate the determinant

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