1.

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) \(\sqrt{\frac{s-b}{ca}}\)

Answer»

Correct option is: (C) \(\sqrt{\frac{s(s-b)}{ca}}\)



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