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If A+B+C=π, then prove that sinA2+sinB2+sinC2−1=4sinπ−44.sinπ−B4.sinπ−C4 |
| Answer» If A+B+C=π, then prove that sinA2+sinB2+sinC2−1=4sinπ−44.sinπ−B4.sinπ−C4 | |