In a triangle ABC, `a^2cos^2A=b^2+c^2` then triangle is

In a triangle ABC, 8R^2=a^2+b^2+c^2 prove that the triangle is right angled

In a triangle ABC, cos A+cos B+cos C=

Let a,b,c be the sides of a triangle ABC, a=2c,cos(A-C)+cos B=1. then the value of C is

Using vector method prove that in any triangle ABC a^2=b^2+c^2-2bc cos A .

If in a triangle a cos^2C/2+cos^2A/2=(3b)/2, then find the relation between the sides of the triangle.

If in a triangle ABC,a^2+b^2+c^2 = ca+ ab sqrt3 , then the triangle is

In triangle ABC if 2sin^(2)C=2+cos2A+cos2B , then prove that triangle is right angled.

If in a triangle ABC, (bc)/(2 cos A) = b^(2) + c^(2) - 2bc cos A then prove that the triangle must be isosceles.

In a triangle ABC, if 2a cos ((B-C)/(2))=b+c , then secA is equal to :

If sinA=sin^2B and 2cos^2A=3cos^2B then the triangle ABC is