If in `DeltaABC, (tan A - tan B)/(tan A + tan B) = (c-b)/c`, prove that : `A = 60^0`.

In DeltaABC, tan B + tanC=5 and tan AtanC=3 , then

If in Delta ABC, tan.(A)/(2) = (5)/(6) and tan.( C)/(2)= (2)/(5) , then prove that a, b, and c are in A.P.

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

In DeltaABC,(a+b+c)(tan(A/2)+tan (B/2))=

Prove that : (tan A + tan B)/(tan A - tan B) = (sin (A+B))/(sin(A-B))

If in DeltaABC, a=15, b = 36, c=39 , find tan (A/2)

Prove that : (cot A + tan B)/ (cot B + tan A) = cot A tan B

In Delta ABC if tan(A/2) tan(B/2) + tan(B/2) tan(C/2) = 2/3 then a+c

If tan^(-1) a+tan^(-1) b +tan^(-1)c=pi , prove that a+b+c=abc.

In a DeltaABC,(a+c)/(a-c)tan(B/2) is equal to