In any triangle `ABC "if" (b+c)/(a)="cot"(A)/(2)`, prove that the triangle is right-angled.

In any triangle ABC, if 8R^(2) =a^(2) + b^(2) +c^(2) , prove that, the triangle is right angled.

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

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

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

If in a ABC,cos^(2)A+cos^(2)B+cos^(2)C=1 prove that the triangle is right angled.

In any triangle ABC if 2cos B=(a)/(c), then the triangle is(A) Right angled (C) Isosceles (B) Equilateral (D) None of these

In any triangle ABC : If a cos A = b cos B, prove that either the triangle is isosceles or right-angled.

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

If in a triangle ABC,(2cos A)/(a)+(cos B)/(b)+(2cos C)/(b)=(a)/(bc)+(b)/(ca), then prove that the triangle is right angled.

If in triangle ABC, cot A + cot B + cot C = sqrt3 , prove that the triangle is equilateral.