" 8."1-tan(A)/(2)tan(B)/(2)=(2c)/(a+b+c)=(c)/(s)

Prove the questions : 1-tan.(A)/(2)tan.(B)/(2) = (2c)/((a+b+c))

Prove the questions : 1-tan.(A)/(2)tan.(B)/(2) = (2c)/((a+b+c))

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

Prove that 1-tan(A/2)tan(B/2)=(2c)/(a+b+c) .

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

Prove that (s-a)tan((A)/(2))=(s-b)tan((B)/(2))=(s-c)tan((C)/(2))

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) .

In DeltaABC , if "tan"(A)/(2)"tan"(C)/(2)=(1)/(2) , then a ,b and c are in

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

Show that in any triangle ABC,(a+b+c)(tan((A)/(2))+tan((B)/(2)))=2c cot((C)/(2))