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

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

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

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

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

In any triangle ABC, prove that : (b^2-c^2) tan B tan C + (c^2-a^2)tan C tan A+ (a^2-b^2)tan A tan B =0 .

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

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

In Delta ABC, prove that (a^(2) - b^(2) + c^(2)) tan B = (a^(2) + b^(2) - c^(2)) tan C.

In any DeltaABC , prove that asin(A/2+B)=(b+c)sin""A/2