A) \[1\]
B) \[0\]
C) \[2\]
D) None of these
Correct Answer: B
Solution :
[b] We have, \[\left| \begin{matrix} \cos (A-P) & \cos (A-Q) & \cos (A-R) \\ \cos (B-P) & \cos (B-Q) & \cos (B-R) \\ \cos (C-P) & \cos (C-Q) & \cos (C-R) \\ \end{matrix} \right|\] \[\left| \begin{matrix} \cos A & \sin A & 0 \\ \cos B & \sin B & 0 \\ \cos C & \sin C & 0 \\ \end{matrix} \right|\times \left| \begin{matrix} \cos P & \sin P & 0 \\ \cos Q & \operatorname{sinQ} & 0 \\ \cos R & \sin R & 0 \\ \end{matrix} \right|=0.0=0\]You need to login to perform this action.
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