\[
\boxed{
x \left( {\frac {\rm d}{{\rm d}x}}y \left( x \right)  \right) \ln  \left( x \right) \sin \left( y \left( x \right)  \right) +\cos \left( y \left( x \right)  \right)  \left( 1-x\cos \left( y \left( x \right)  \right)  \right) =0}
\]