y/x=z
y'=z+z'x
z+z'x=z+ sin(z)/x
z'x=sin(z)/x
dz/dx= sin(z)/ x^2
dz / sin z = dx/x^2
ln ( sin (z/ ln (cos (z/2))=-1/x+c
ln (tg (y/2x))=-1/x+c
tg(y/2x)=exp(-1/x+c)
y=2x arctg(exp(-1/x+c))
