(a+b+c)(tan(A)/(2)+tan(B)/(2))=2cot(c)/(2)

In DeltaABC , prove that: (a+b+c).(tan(A/2)+tan(B/2))=2c cot(C/2)

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

tan((A+B)/(2))="cot"(C)/(2)

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

find the value of K if (a+b+c)[tan((A)/(2))+tan((B)/(2))]=kc*cot((c)/(2))

Show that in any triangle ABC, (a+b+c) (tan (A/2) + tan (B/2)) = 2c cot (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 Delta ABC if tan((A)/(2))tan((B)/(2))+tan((B)/(2))tan((C)/(2))=(2)/(3) then a+c

if ABC is a triangle and tan((A)/(2)),tan((B)/(2)),tan((C)/(2)) are in H.P. Then find the minimum value of cot((B)/(2))