Question

If A, B, C are the angles of a triangle ABC, then the determinant $\Delta =\left[\begin{array}{ccc}\sin 2A& \sin C& \sin B\\ \sin C& \sin 2B& \sin A\\ \sin B& \sin A& \sin 2C\end{array}\right]$ is equal to

• A. 1
• B. -1
• C. sin A +sin B +sin C
• D. none of these.

Answer 1

Answer: (D)

Its value is zero