" 28.Prove that the triangle "ABC" is equilateral iff,"cot A+cot B+cot C=sqrt(3)

Prove that the triangle ABC is equilateral if cot A+cot B+cot C=sqrt(3)

In Delta ABC if cot A+cot B+cot C=sqrt(3) then Delta ABC is

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

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

In Delta ABC If cot A+cot B+cot C=sqrt(3) then Delta ABC is

If circum-radius and in-radius of a triangle ABC be 10 and 3 units respectively , then a cot A + cot B + cot C is equal to