In a triangle ABC, `cos 3A+cos 3B+cos3C=1` and `angleA+angleBltangleC`, then find possible measure of `angleC`.

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

In a triangle ABC, cos 3A + cos 3B + cos 3C = 1 , then find any one angle.

In a triangle ABC, cos 3A + cos 3B + cos 3C = 1 , then find any one angle.

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

In an isosceles triangle ABC, AB=AC and angleA=3angleB. Find angleC .

In a triangle ABC, cos 3A + cos 3B + cos 3C = 1 , then then one angle must be exactly equal to

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

In the triangle ABC, if cos 3 A + cos 3B+ cos 3C=1 , show that the triangle is obtuse-angled.

In a triangle ABC is 2 cos (B)/(2) cos (C )/(2)=(1)/(2)+ ((b+c)/(a)) sin (A)/(2) then find the measure of angle A.