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In triangle ABC, angle A gt pi/2. A A_(1) and A A_(2) are the medium and altitude, espectively. If angle B A A_(1)= angle A _(1) A A_(2)=angle A _(2) AC, then sin^(3)""A/3 . Cos ""A/3is equal to |
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Answer» `(3A^(3))/(16b^(2)c)` |
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