If \( \Delta=\left|\begin{array}{ccc}\sin \alpha & \cos \alpha & \s...
If \( \Delta=\left|\begin{array}{ccc}\sin \alpha & \cos \alpha & \sin (\alpha+\delta) \\ \sin \beta & \cos \beta & \sin (\beta+\delta) \\ \sin \gamma & \cos \gamma & \sin (\gamma+\delta)\end{array}\right| \) then \( \Delta \) is independent of
(a) \( \alpha \)
(b) \( \beta \)
(c) \( \gamma \)
(d) \( \delta \).
\( \mathrm{P} \)
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