If in a `DeltaABC`, `/_B=(2pi)/3` then `cosA+cosC` lie in

If in a triangle ABC, B = (2pi)/3, then cosA +cosC lies in

If in DeltaABC, a=4,b=6,c=8 then 2cosA+4cosB+cosC=

If in DeltaABC, a=4,b=6,c=8 then 2cosA+4cosB+cosC=

If in a DeltaABC , cosA+2cosB+cosC=2, then a,b,c are in

If in a Delta ABC, cosA+ cosB + cosC =3/2. Prove that DeltaABC is an equilateral triangle.

If in DeltaABC,(cosA)/(a)=(cosB)/(b)=(cosC)/(c) and side a=2, then the area of the triangle is

For a DeltaABc, it is given that cosA +cosB+cosC=3/2. prove that the Delta is equilateral.

If in a Delta ABC, cosA+ cosB + cosc =3/2. Prove that DeltaABC is an equilateral triangle.

If in a DeltaABC, 2(cosA)/(a)+(cosB)/(b)+(2cosC)/(c)=(a)/(bc)+(b)/(ca) Then, the value of the angleA is ...... Degree