If $A, B, C$ are angles of a triangle, then $\sin 2A + \sin 2B - \sin 2C$ is equal to
If $A, B, C$ are angles of a triangle, then $\sin 2A + \sin 2B - \sin 2C$ is equal to
- A
$4\sin A\,\,\cos B\,\,\cos C$
- B
$4\cos A$
- C
$4\sin A\,\cos A$
- D
$4\cos A\,\cos B\,\sin C$
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