# Thread: [SOLVED] no idea for this(hard for me )!

1. ## [SOLVED] no idea for this(hard for me )!

let be a,b,c be a ribs of a triangle ABC with S(topless).
proof the inequality

$(a^2+b^2)(b^2+c^2)(c^2+a^2)<=64S^3*csc2A*csc2B*csc 2C$

im sorry if im in bad section but it just i'm so courageous to know the solution of this task that i founded in net...

2. ok i founded solution...nobody had an idea here :S anyway thanks