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

If A+B+C=pi, show that : tan.(A)/(2)tan.(B)/(2)+tan.(B)/(2)tan.(C)/(2)+tan.(C)/(2)tan.(A)/(2)=1 Hence deduce that : cot.(A)/(2)+cot.(B)/(2)+.cot.(C)/(2)=cot.(A)/(2).cot.(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 equal to a) (pi)/(6) b)3 c)2 d)1

In triangleABC,A+B+C=pi , show 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 ,then 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 , show that : tan""(A)/(2) tan""(B)/(2) + tan""(B)/(2)tan""(C)/(2)+tan""(C)/(2)tan""(A)/(2) = 1 .

v) 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

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

s^(2)tan((A)/(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