In triangle `ABC` , `(1+cos(A-B)cosC)/(1+cos(A-C)cosB)=`

In a triangle ABC, (cosB+cosC)/(1-cosA) =

In any DeltaABC , prove that (1+cos(A-B)cosC)/(1+cos(A-C)cosB)=(a^(2)+b^(2))/(a^(2)+c^(2))

Prove that in a triangle ABC, (cosB-cosC)/(cosA+1) =(c-b)/a

If in a triangle ABC,(1+cosA)/(a)+(1+cosB)/(b)+(1+cosC)/(c)=(k^(2)(1+cosA)(1+cosB)(1+cosC))/(abc) then k is equal to

In any triangle ABC, if (cosB+ 2 cosA)/(cos B + 2cosC ) = (sin C)/(sinA) then prove that, the triangle is either isosceles or right angled.

In triangle ABC , prove that cos(A+B)+sinC=sin(A+B)-cosC

In a triangle ABC , (cosA)/(a)=(cosB)/(b)=(cosC)/(c) . If a=(1)/(sqrt(6)) , then the area of the triangle (in square units) is a) 1//24 b) sqrt(3)//24 c) 1//8 d) 1//sqrt(3)

In a triangle ABC, if (cosA)/a=(cosB)/b=(cosC)/c and the side a =2 , then area of triangle is