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

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

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

In a triangle ABC , if cos A = cos B cos C , what is the value of tan A- tan B - tan 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.