In a triangle ABC, if b^2 + c^2 = 3a^2, ...

In a `triangle ABC`, if `b^2 + c^2 = 3a^2`, then `cotB + cotC-cotA` is equal to

A

(a) 1

B

(b) `(ab)/(4Delta)`

C

(c) 0

D

(d) `(ac)/(4Delta)`

Verified by Experts

The correct Answer is:

C

Similar Questions

Explore conceptually related problems

In a triangle ABC, if a = 2, b = 3 and c=4 , then cos A is equal to

In a triangle ABC, if a = 2, B=60^(@)andC=75^(@) , then b =

In a triangle ABC, if sin A sin B= (ab)/(c^(2)) , then the triangle is :

If in a triangle ABC, 2cosA=sinBcosecC , then

In triangle ABC, if A+C=2B , then (a+c)/(sqrt(a^(2)-ac+c^(2))) is equal to

If the area of a triangle ABC is given by Delta=a^(2)-(b-c)^(2) , then tan.(A)/(2) is equal to

In a triangle ABC, if a =2x, b=2y and C=120^(@), then the area of the triangle is...a)xy b)2xy c) sqrt3 xy d)3xy

In a triangle ABC, if b+c=2aandangleA=60^(@),"then "DeltaABC is

In a triangle ABC, a= 4, b = 3, angleA= 60° . Then, c is the root of the equation

In any triangle ABC. sin ^(2) ""A/2 + sin ^(2) ""B/2 + sin ^(2) ""C/2 is equal to