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In any ∆ABC, cosB/2 =(A) \(\sqrt{\frac{s(s-c)}{ca}}\)(B) \(\sqrt{\frac{s(s-a)}{ca}}\)(C) \(\sqrt{\frac{s(s-b)}{ca}}\)(D) \(\sqrt{\frac{s-b}{ca}}\) |
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Answer» Correct option is: (C) \(\sqrt{\frac{s(s-b)}{ca}}\) |
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