" In "Delta ABC,If cos3A+cos3B+cos3C+cos3 pi=0" then the least value of the sum of two of its angles "

In DeltaABC,"if "cos3A+cos3B+cos3C+cos3pi=0 , then the least value of the sum of two of its angles is

In Delta ABC, if cos A+cos B+ cos C=3//2 , then the triangle is

In Delta ABC, if cos^2 A+ cos^2 B+cos^2 C=3//4 , then the triangle is

If cos 3A +cos 3B+cos 3C=1 then one of the angles of the triangle ABC is

If cos 3A +cos 3B+cos 3C=1 then one of the angles of the triangle ABC is

In a triangle ABC ,cos A + cos B + cos C = 3/2 , then the triangle ,is

In a Delta ABC cos3A+cos3B+cos3C=1 then a) Delta ABC is right angled b) Delta ABC is acute anled c Delta ABC is obstuse angled

In a triangle ABC,cos3A+cos3B+cos3C=1, then find any one angle.

If in a triangle ABC, cos3A+cos3B+cos3C=1 , then one angle must be exactly equal to