If `cos^2A+cos^2B+cos^2C=1,t h e n A B C` is (a)equilateral (b) isosceles (c)right angles (d) none of these

If cos^2A+cos^2B+cos^2C=1, t h e n ABC is (a)equilateral (b) isosceles (c)right angled (d) none of these

If cos^(2)A+cos^(2)B+cos^(2)C=1, then ABC is (a)equilateral (b) isosceles (c)right angles (d) none of these

If cos^2A+cos^2B+cos^2C=1, t h e n ABC is

If : cos^(2) A + cos^(2) B + cos^(2) C = 1, "then" : Delta ABC is A)scalane B)equilateral C)isosceles D)right angled

What kind of triangle is formed by A(1, 2), B(4, 3) and C(5, 6)? (a)Equilateral (b)Isosceles (c)Right Angle (d)None of these

In Delta ABC, if cos A+cos B+cos C=(3)/(2) then the triangle is (i) Isosceles (ii) equilateral (iii) Right Angled (iv) none pf these

In a Delta ABC , 2 sinA cos B + 2 sin B cos C + 2 sin C cos A = sin A + sin B + sin C, then Delta ABC is (a) Isoceles (b) Right Angled (c) Acute (d) None of these

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

If sinA=sin^2Ba n d2cos^2A=3cos^2B then the triangle A B C is right angled (b) obtuse angled (c)isosceles (d) equilateral