In any `DeltaABC`, prove that `cot (A/2) + cot (B/2) + cot (C/2) = (a+b+c)/(b+c-a) cot (A/2)`
Channel: Doubtnut
Date: 2020-04-05

In any `DeltaABC`, prove that `cot (A/2) + cot (B/2) + cot (C/2) = (a+b+c)/(b+c-a) cot (A/2)`