If \( \Delta=\left|\begin{array}{ccc}\cos \alpha & \sin \alpha \cos...
If \( \Delta=\left|\begin{array}{ccc}\cos \alpha & \sin \alpha \cos \beta & \sin \alpha \sin \beta \\ -\sin \alpha & \cos \alpha \cos \beta & \cos \alpha \sin \beta \\ 0 & -\sin \beta & \cos \beta\end{array}\right| \)
then \( \Delta \) is independent of
(a) \( \alpha \)
(b) \( \beta \)
(c) \( \gamma \)
(d) none of these
\( \mathrm{P} \)
W
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