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

In triangle ABC, prove that 'tan((B-C)/2)=(b-c)/(b+c)cotA/2 tan(C-A)/2=(c-a)/(c+a)cotB/2 tan(A-B)/2=(a-b)/(a+b)cotC/2

In any triangle ABC, prove that tan((B-C)/2)=(b-c)/(b+c) cot frac (A)(2)

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

If the sides a,b,c are in A.P.prove that (tan)(A)/(2)+(tan)(c)/(2)=(2)/(3)(cot)(B)/(2)

In Delta ABC, if (b-c)/(b+c)cot((A)/(2))+(b+c)/(b-c)tan((A)/(2))=2, then Delta ABC is (A) Right angled (B) Acute angled (C) Equilateral (D) Obtuse angled

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

If A+B+C=pi , prove that (a) tan 3A+tan3B+tan3C=tan3A tan 3B tan 3C (b) cot""(A)/(2)+cot""(B)/(2)+cot""(C)/(2)=cot""(A)/(2)cot""(B)/(2)cot""(C)/(2)

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

In any triangle , prove that ((b-c)/( b+c)) cot ""(A)/(2) +((b+c)/(b-c)) tan ""(A)/(2) = 2 cosec (B-C)