${\color{Green} sin A .sin C=3.sin\frac{B}{2}}$
Edited by dark templar, 04-01-2013 - 17:06.
Edited by dark templar, 04-01-2013 - 17:06.
Edited by thanhdotk14, 04-01-2013 - 15:59.
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Edited by nhuanmaths, 05-01-2013 - 18:42.
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