\[
\boxed{
{\frac {\rm d}{{\rm d}x}}y \left( x \right) + \left( y \left( x \right)  \right) ^{2}\sin \left( x \right) -2\,{\frac {\sin \left( x \right) }{ \left( \cos \left( x \right)  \right) ^{2}}}=0}
\]