`cot A+ cot B+ cot C`

If A,B ,C are the angle of Delta ABC then cot A .cot B + cot B . "" cot C + cot C.cot A =

If A + B + C = pi , show that cot A cot B + cot B cot C + cot C cot A = 1

If A,B ,C are the angle of Delta ABC then cot A .cot B + cot B . "" cot C + cot C.cot A = ............... A) 0 B) 1 C) 2 D) -1

a cot A+b cot B+c cot C=

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

In any triangle ABC,a cot A+b cot B+c cot C is equal to

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

In a DeltaABC, prove that: 2r le (a cot A+ b cot B+ c cot C)/(3)leR