[" Q.7If "A,B,C" are the interior angles of a triangle "ABC," prove that "],[qquad tan(B+C)/(2)=cot(A)/(2)]

If A,B,C are the interior angles of a triangle ABC, prove that (tan(B+C))/(2)=(cot A)/(2)

If A ,\ B ,\ C are the interior angles of a triangle A B C , prove that tan(B+C)/2=cotA/2

If A,B,C are the interior angles of a triangle ABC, prove that tan((C+A)/(2))=(cot B)/(2)( ii) sin((B+C)/(2))=(cos A)/(2)

If A, B, C are interior angles of triangle ABC, prove that :- 1+tan^2((B+C)/2)=cosec^2A/2 .

If A,B,C are angles of a triangle, prove that "tan "(B+C)/(2)="cot"(A)/(2) .

If A, B, C are interior angles of triangle ABC, prove that :- tan((A+B)/2)=cot "C/2 .

If A, B, C are interior angles of triangle ABC, prove that :- 1+cot^2((B+C)/2)=sec^2 "A/2 .

If A ,\ B ,\ C are the interior angles of a triangle A B C , prove that tan((C+A)/2)=cotB/2 (ii) sin((B+C)/2)=cosA/2

If A, B and C are interior angles of a triangle ABC, then show that tan((A + B)/(2)) = cot ""(C)/(2)

If A,B and C are the interior angles of a triangle ABC, then show that cot((A+B-C)/(2))=tan C