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

In triangle A B C ,\ the est values of sumcos e c(A/2)a n d\ sumsec^2(A/2) are 6 and 4 respectively.

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 an acute angled triangle ABC, the least values of Sigma secA and Sigma tan^2 A are 6 and 9 respectively.

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

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

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

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

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

For any triangle ABC, prove that a(bcosC-ccosB)=b^2-c^2

In triangle ABC, prove that the maximum value of tan(A/2)tan(B/2)tan(C/2)i s R/(2s)