Rugaminte

[Virgil Nicula]

Prove that in any acute triangle ABC there are the inequalities :

1. (b+c)/cosA+(c+a)/cosB+(a+b)/cosC >sau= 4(a+b+c).

2. a/(cos B+cos C)+b/(cos C+cos A)+c/(cos A+cos B) >sau= (a+b+c).



Rezolvati va rog LaTeX - ul ... In caz contrar, cu parere de rau, aceasta va fi ultima mea postare. Buna dimineata !