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Prove that $\sin A - \sin B + \sin C = 4\sin A/2 \cos B/2 \sin C/2$ occurs in an $ABC$ triangle. I don't know how to solve the RHS... Can anyone help me please?

Asinomás
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user3018347
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1 Answers1

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Hint: Use the Half Angle identities to simplify the right side into terms of A, B, and C. After that, it should be much easier.

Asimov
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  • Did trying this help at all? Or do you still need more of a hint? Where did you get stuck if it didn't help? – Asimov Jun 17 '14 at 01:05