Internal problem ID [9746]
Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 2, linear second order
Problem number: 1418.
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _with_linear_symmetries]]
\[ \boxed {y^{\prime \prime }+\frac {x \sin \left (x \right ) y^{\prime }}{\cos \left (x \right ) x -\sin \left (x \right )}-\frac {\sin \left (x \right ) y}{\cos \left (x \right ) x -\sin \left (x \right )}=0} \]
✓ Solution by Maple
Time used: 0.36 (sec). Leaf size: 47
dsolve(diff(diff(y(x),x),x) = -x*sin(x)/(cos(x)*x-sin(x))*diff(y(x),x)+sin(x)/(cos(x)*x-sin(x))*y(x),y(x), singsol=all)
\[ y \left (x \right ) = \sin \left (x \right ) \left (c_{1} +c_{2} \left (\int {\mathrm e}^{-\left (\int \frac {2 \cos \left (x \right ) \cot \left (x \right ) x -3 \cos \left (x \right )+\sec \left (x \right )}{-\sin \left (x \right )+\cos \left (x \right ) x}d x \right )} \cos \left (x \right )d x \right )\right ) \]
✓ Solution by Mathematica
Time used: 0.172 (sec). Leaf size: 15
DSolve[y''[x] == (Sin[x]*y[x])/(x*Cos[x] - Sin[x]) - (x*Sin[x]*y'[x])/(x*Cos[x] - Sin[x]),y[x],x,IncludeSingularSolutions -> True]
\[ y(x)\to c_1 x+c_2 \sin (x) \]