\[ y'(x) (x \cos (y(x))+\cos (x))+\sin (y(x))-y(x) \sin (x)=0 \] ✓ Mathematica : cpu = 0.0577579 (sec), leaf count = 17
\[\text {Solve}\left [c_1=x \sin (y(x))+y(x) \cos (x),y(x)\right ]\]
✓ Maple : cpu = 0.1 (sec), leaf count = 15
\[ \left \{ y \left ( x \right ) \cos \left ( x \right ) +x\sin \left ( y \left ( x \right ) \right ) +{\it \_C1}=0 \right \} \]