\(|Fx|=500\ \cos\left(45\right)=\)
\(|Fx|=353.55\)
\(|Fy|=500\ \sin\left(45\right)=\)
\(|Fy|=353.55\)
Despues determinamos  
http://www.dcnetwork.com.mx/rec/ma/Problemas%20Fundamentales%20sobre%20Res%20de%20Sist%20de%20Fzas.pdf