With usual notations prove that in a triangle ABC, `cot(A/2)+cot(B/2)+cot(C/2)=s^2/Delta`

In a triangle ABc , if r^2cot(A/2) cot(B/2) cot(C/2)=

With usual notations,prove that in a triangle ABC cot A+cot B+cot C=(a^(2)+b^(2)+c^(2))/(4Delta)

show that in a triangle /_ABC:a cot A+b cot B+c cot C=2(R+r)

Prove that cot.(A)/(2)+cot.(B)/(2)+cot.(C)/(2)=(s^(2))/(Delta)

In a triangle ABC, if r^(2)cot((A)/(2))cot((B)/(2))cot((C)/(2))=

Prove that cot""A/2+cot""B/2+cot""C/2=s^2/Delta

In triangle ABC, prove that tan(B+C)/2=cot(A/2)

In Delta ABC, cot ""(A)/(2) +cot""(B)/(2) + cot""(C)/(2)=

In a triangle ABC, prove that the ratio of the area of the incircle to that of the triangle is pi:cot(A/2) cot(B/2) cot(C/2)