(b-c)/(a)=(tan B/2-tan C/2)/(tan B12+tan C/2)

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

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

IF A+B+C =pi , then tan ((A)/(2)) tan ((B)/(2)) + tan (B/2) tan (C/2) + tan (C/2 ) tan ((A)/(2)) is

(tan A)/(2)(tan B)/(2)+(tan B)/(2)(tan C)/(2)+(tan C)/(2)(tan A)/(2) =1

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

If A+B+C=pi , prove that : tan( A/2) tan (B/2) + tan (B/2 )tan (C/2)+ tan( C/2) tan (A/2) =1

If A+B+C=pi , prove that : tan( A/2) tan (B/2) + tan (B/2 )tan (C/2)+ tan( C/2) tan (A/2) =1

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

If A+B+C=pi, then the value of (tan ""A/2 tan ""B/2+tan ""B/2 tan ""C/2 + tan ""C/2 tan ""A/2) is-

If A+B+C=pi, prove that (tan A)/(tan B tan C)+(tan B)/(tan Atan C)+(tan C)/(tan A tan B)=tan A+tan B+tan C-2cot A-2cot B-2cot C