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

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

(tan(B/2)-tan(C/2))/(tan(B/2)+tan(C/2))

In any triangle ABC, prove that following: (c)/(a+b)=(1-tan((A)/(2))tan((B)/(2)))/(1+tan((A)/(2))tan((B)/(2)))

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

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

In any triangle ABC, prove that: (b-c)/(b+c)=(tan((b-C)/(2)))/(tan((B+C)/(2)))

In any triangle ABC,prove that (a-b)/(a+b)=(tan((A-B)/(2)))/(tan((A+B)/(2)))

(b-c)/(a) = (tan B/2-tan( c/2))/(tan B/2+tan C/2)

In a triangle Delta ABC , prove the following : (tan A//2)/((a-b)(a-c))+(tan B//2)/((b-c)(b-a))+(tan C//2)/((c-a)(c-b)) = (1)/(Delta)

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