Prove : `r cot A/2 + a = r cot B/2 + b + r cot C/2 + c`

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

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

In Delta ABC Prove that a cot A + b cot B + c cot C = 2 ( R + r)

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)

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)

If A + B + C =pi/2 , prove that : cot A + cot B + cot C = cot A cot B cot C .

In any triangle A B C , prove that: (b-c)cot A/2+(c-a)cot B/2+(a-b)cot C/2 =0

If A+B+C=pi Prove that cot A/2+cot tB/2+cot C/2=cot A/2cot B/2cot C/2

If A+B+C=180^(@) , then the value of cot(A/2)+cot(B/2)+cot(C/2) will be .............. A) 2 cot ""A/2 cot ""B/2 cot""C/2 B) 4 cot ""A/2 cot ""B/2 cot ""C/2 C) cot ""A/2 cot ""B/2 cot ""C/2 D) 8 cot ""A/2 cot ""B/2 cot ""C/2