If A+B+C = 180 degree then prove that sinA/2 + sin B/2+ sin C/2=1 +sinπ-A4sinπ-B4 sinπ-C4 .

If A+B+C = 180 degree then prove that $\sin A / 2 + \sin B / 2 + \sin C / 2 = 1 + \sin \frac{π - A}{4} \sin \frac{π - B}{4} \sin \frac{π - C}{4}$ .

Matching exercise

Match the items on the right to the items on the left.

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