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

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

In any triangle ABC, prove that following: (a-b)(cos C)/(2)c sin((A-B)/(2))

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

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

In any triangle A B C , prove that following: (a^2-c^2)/(b^2)=("sin"(A-C))/("sin"(A+C))

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

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

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

In any triangle A B C , prove that following: \ \ asin(A/2)sin((B-C)/2)+bsin(B/2)sin((C-A)/2)+c sin(C/2)sin((A-B)/2)=0.