Given a triangle ABC with sides `a=7; b=8 and c=5` Find the value of expressions `(sinA+sinB+sinC)(cot(A/2)+cot(B/2)+cot(C/2))`

Given a triangle ABC with sides a=7,b=8 and c=5. Find the value of expression (sin A+sin B+sin C)(cot(A)/(2)+cot(B)/(2)+cot(C)/(2))

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

In a triangle ABC if b+c=3a then find the value of cot((B)/(2))cot((C)/(2))

In a triangle ABC,if a cot A+b cot B+c cot C=

In a triangle ABC if a^(2)+b^(2)=101c^(2) then find the value of (cot C)/(cot A+cot B)

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))

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