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

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

In triangle ABC, cos^2A + cos^2B - cos^2C = 1, then the triangle is necessarily

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 triangle ABC,cos A+2cos B+cos C=2, then-

If in a triangle Delta ABC,a^(2)cos^(2)A-b^(2)-c^(2)=0 then

In a triangle ABC,cos^(2)A+cos^(2)B+cos^(2)C=

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 isosceless