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

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