In a triangle ABC, cos A+cos B+cos C=

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

In a triangle ABC, a cos A+b cos B+ c cos C=

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

In triangle ABC, if cos A+cos B+cos C=(7)/(4),then(R)/(r) is equal to (3)/(4) (b) (4)/(3)(c)(2)/(3)(d)(3)/(2)

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 .