Prove that in triangle ABC, the least values of `sumcosec(A/2)` and `sumsec^2(A/2)` are 6

Prove that in triangle ABC, the least values of sum cos ec((A)/(2)) and sum sec^(2)((A)/(2)) are 6

Prove that in an acute triangle ABC,the least values of Sigma sec A and Sigma tan^(2)A are 6 and 9 respectively.

Prove that in triangle ABC, 2cos A cosB cos Cle(1)/(8) .

In any triangle ABC, the least value of (r_(1)+r_(2)+r_(3))/(r) is

In a triangle ABC,B=90^(@) then the value of tan((A)/(2))=

In a triangle ABC,B=90^(@) then the value of tan((A)/(2))=

In a triangle ABC, prove that (b + c)/(a) le cosec.(A)/(2)

Prove that in triangle ABC , cos^(2)A + cos^(2)B + cos^(2)C lt 3/4 .

In any triangle ABC, find the least value of (r_(1) + r_(2) + r_(3))/(r)

In any triangle ABC , prove that a(cosB+cot(A/2).sinB)=b+c .