In a triangle `A B C ,` if `cos A+2\ cos B+cos C=2.` prove that the sides of the triangle are in A.P.

In any triangle ABC if cosA + 2cos B + cosC=2 , show that the sides of the triangle are in A.P.

In Delta ABC , if cos A+2 cos B+cos C=2, then the sides of the triangle are in

If cos A+cos B+2cos C=2, then the sides of triangle ABC are in

In a triangle ABC if a cos^2(C/2)+c cos^2(A/2)=((3b)/2) show that sides of the trianglea are in A.P.

If in a triangles a cos^(2)(C/2)+c cos^(2)(A/2)=(3b)/2 , then the sides of the triangle are in

In a triangle ABC,if (cos A)/(a)=(cos B)/(b)=(cos C)/(c) and the side a=2 then area of triangle is and the side a=2

If cos A+cos B+2cos C=2 then the sides of the A B C are in A.P. (b) G.P. (c) H.P. (d) none

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