In any `DeltaABC`, prove that : `(cos A)/a + a/(bc) = (cos B)/b + b/(ca) = (cos c)/c + c/(ab)`

In any Delta ABC, prove that :(cos A)/(a)+(a)/(bc)=(cos B)/(b)+(b)/(ca)=(cos c)/(c)+(c)/(ab)

In any DeltaABC , prove that (c-bcosA)/(b-c cos A)=(cos B)/(cosC)

In any DeltaABC , prove that (sin B)/(sin C) = (c-a cos B)/(b-a cos C)

In any DeltaABC , prove that : (cos A)/(b cos C + c cos B) + (cos B)/(c cos A + a cos C) + (cos C)/(a cos B + b cos A) = (a^2 + b^2 + c^2)/(2abc)

In any Delta ABC, prove that :a cos A+b cos B+c cos C=2a sin B sin C

In any DeltaABC , prove that : a cos A + b cos B + c cos C = 2a sin B sin C

In any Delta ABC, prove that :(b+c)cos A+(c+a)cos B+(a+b)cos C=a+b+c

In any DeltaABC , prove that : (cos^2(A/2))/a + (cos^2(B/2))/b + (cos^2(C/2))/c = s^2/(abc)

For any DeltaABC , prove that a(b cos C -c cos B) = b^2 - c^2