%0 Journal Article %A J. M. Habeb %A M. Hajja %T A Method for Establishing Trigonometric Inequalities Involving the Cotangents of the Angles of a Triangle %J Journal for geometry and graphics %D 2008 %P 11-21 %V 12 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/JGG_2008_12_1_JGG_2008_12_1_a1/ %F JGG_2008_12_1_JGG_2008_12_1_a1