y?=xy?+sec(xy?)y=xcos?1(ln?x?+C)y=xcos?1(xln?x?+C)y=xsin?1(ln?x?+Cx)y=xsin?1(xln?x?+C)y=xsin?1(ln?x?+C)?
Solve using an appropriate substitution dxdy?=sin(x?y)tan(x?y)+sec(x?y)=x+Carctan(x?y)?sec2(x?y)=x+Ctan(x?y)+sec(x?y)=y+Carctan(x?y)?sec2(x?y)=y+Ctan(x?y)?sec2(x?y)=x+C?