In any `DeltaABC`, prove that : `(a-b)/c = (sin((A-B)/2))/(cos(C/2)`

In DeltaABC , prove that: (a-b)/c=(sin(A-B)/(2))/(cosC/2)

For any triangle ABC ,prove that (a-b)/(c)=(sin((A-B)/(2)))/(cos(C)/(2))

In any Delta ABC, prove that :(a+b)/(c)=(cos((A-B)/(2)))/(sin((c)/(2)))

In any DeltaABC , prove that ((a-b))/c"cos"C/2="sin"((A-B))/2

In any DeltaABC , prove that ((b-c))/acosA/2=sin((B-C))/2

In any triangle ABC, prove that (i) (a-b)/( c)=("sin"(A-B)/(2))/("cos"( C)/(2)) (ii) (b-c)/(a)=("sin"(B-C)/(2))/("cos"(A)/(2))

In any DeltaABC , prove that ((a+b))/csin""C/2=cos""((A-B))/2

In any Delta ABC, prove that :(b+c)cos((B+C)/(2))=a cos((B-C)/(2))])

For any triangle ABC ,prove that (a+b)/(c)=(cos((A-B)/(2)))/(sin(C)/(2))

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