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

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

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

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