If `A+B+C=pi`, prove that : `cot( A/2)+ cot(B/2) + cot( C/2) = cot( A/2) cot(B/2) cot(C/2)`
Channel: Doubtnut
Date: 2020-04-12

If `A+B+C=pi`, prove that : `cot( A/2)+ cot(B/2) + cot( C/2) = cot( A/2) cot(B/2) cot(C/2)`