In acute angled `triangle ABC` prove that `tan ^(2)A+tan^(2)B+tan^(2)Cge9`.

If A+B+C=pi, prove that tan^2A/2+tan^2B/2+tan^2C/2geq1.

If A+B+C=pi, prove that tan^2A/2+tan^2B/2+tan^2C/2geq1.

If A, B, C be an acute angled triangle, then the minimum value of tan^(4)A+tan^(4)B+tan^(4)C will be

In an actue-angled triangle ABC Statement-1: tan^(2)""(A)/(2)+tan^(2)""(B)/(2)+tan^(2)""(C)/(2)ge1 Statement-2: tanAtanB tanCge3sqrt3

If A,B,C are angles of a triangle, prove that (tan (B+C)+tan(C+A)+tan(A+B))/(tan (pi-A)+tan(2pi-B)+tan(3pi-C))=1 .

In any triangle A B C , prove that following : c/(a-b)=(tan(A/2)+tan(B/2))/(tan(A/2)-tan(B/2))

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

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

If A,B,C are angles of a triangle, 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((C+A)/2)=cotB/2 (ii) sin((B+C)/2)=cosA/2