trigonometry

Question: In a triangle ABC, the value of $\sin A+\sin B+\sin C$ is

1) $4\sin \frac{A}{2}\sin \frac{B}{2}\sin \frac{C}{2}$

2) $4\cos \frac{A}{2}\cos \frac{B}{2}\cos \frac{C}{2}$

3) $4\cos \frac{A}{2}\sin \frac{B}{2}\sin \frac{C}{2}$

4) $4\cos \frac{A}{2}\sin \frac{B}{2}\cos \frac{C}{2}$

Solution:

Explanation: No Explanation

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