\[ y'(x) (x \cos (y(x))+\cos (x))+\sin (y(x))-y(x) \sin (x)=0 \] ✓ Mathematica : cpu = 0.175107 (sec), leaf count = 17
\[\text {Solve}[x \sin (y(x))+y(x) \cos (x)=c_1,y(x)]\] ✓ Maple : cpu = 0.111 (sec), leaf count = 15
\[y \relax (x ) \cos \relax (x )+x \sin \left (y \relax (x )\right )+c_{1} = 0\]