In `triangleABC`, if `cos A+ cos B+ cos C=7/5` and `2R = mur`, then the value of `mu` is

If, in triangleABC, (cos A)/a =(cos B)/b =(cos C)/c and side a=2, then the area of the triangle is

In triangleABC, cos((A-B)/(2))=

In triangle ABC, if cos A + cos B + cos C = (7)/(4), " then " (R)/(r) is equal to

In triangle ABC, if cos A + cos B + cos C = (7)/(4), " then " (R)/(r) is equal to

In Delta ABC if 5r = 2R then cos A + cos B + cos C =

In Delta ABC if 5r=2R then cos A+cos B+cos C=

In a triangleABC, prove that a cos A+b cos B+c cos C=2a sin B sin C

If in a triangleABC , cos (A-C) cos B + cos 2 B =0 , then which of the following options is(are) correct? (where, the symbols have their usual meanings).

If in a triangleABC , cos (A-C) cos B + cos 2 B =0 , then which of the following options is(are) correct? (where, the symbols have their usual meanings).

If triangleABC , if cot A+cotB+cotC=0 then find the value of cos A cos B cos C .