Question:
Mark the tick against the correct answer in the following:
$\left|\begin{array}{ccc}\sin \alpha & \cos \alpha & \sin (\alpha+\delta) \\ \sin \beta & \cos \beta & \sin (\beta+\delta) \\ \sin \gamma & \cos \gamma & \sin (\gamma+\delta)\end{array}\right|=?$
A. 0
B. 1
C. $\sin (\alpha+\delta)+\sin (\beta+\delta)+\sin (\gamma+\delta)$
D. none of these
Solution:
