# Inequality trigonometric

• Aug 3rd 2011, 11:28 AM
BUZZ
Inequality trigonometric
Let $ABC$ be a triangle. Prove that:

http://latex.codecogs.com/gif.latex?...B}{2}}\geq%209
• Aug 3rd 2011, 11:34 AM
Also sprach Zarathustra
Re: Inequality trigonometric
Quote:

Originally Posted by BUZZ
Let $ABC$ be a triangle. Prove that:

http://latex.codecogs.com/gif.latex?...B}{2}}\geq%209

Hint: (Giggle)

$A+B+C=180^{\circ}$
• Aug 3rd 2011, 11:42 AM
TheChaz
Re: Inequality trigonometric
Quote:

Originally Posted by Also sprach Zarathustra
Hint: (Giggle)

$A+B+C=180^{\circ}$

Nice
Quote:

Originally Posted by BUZZ
Let $ABC$ be a triangle. Prove that:

http://latex.codecogs.com/gif.latex?...B}{2}}\geq%209

I think I've got it. Care to share your results so that we can compare? I'd say it's only proper, seeing as you just plopped this down without showing any work as your first post on MHF... :)