Internal problem ID [6445]
Book: Own collection of miscellaneous problems
Section: section 3.0
Problem number: 9.
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _linear, _nonhomogeneous]]
\[ \boxed {y^{\prime \prime }+y-\sin \left (x \right )=0} \] With initial conditions \begin {align*} [y^{\prime }\left (1\right ) = 0, y \left (2\right ) = 0] \end {align*}
✓ Solution by Maple
Time used: 0.125 (sec). Leaf size: 77
dsolve([diff(y(x),x$2)+y(x)=sin(x),D(y)(1) = 0, y(2) = 0],y(x), singsol=all)
\[ y \left (x \right ) = \frac {\left (\left (\left (-x +2\right ) \cos \left (x \right )+\sin \left (x \right )\right ) \cos \left (2\right )-\cos \left (x \right ) \sin \left (2\right )\right ) \cos \left (1\right )-\sin \left (1\right ) \left (-\sin \left (x \right ) \cos \left (2\right )+\cos \left (x \right ) \sin \left (2\right ) \left (x -1\right )\right )}{2 \cos \left (2\right ) \cos \left (1\right )+2 \sin \left (2\right ) \sin \left (1\right )} \]
✓ Solution by Mathematica
Time used: 0.01 (sec). Leaf size: 35
DSolve[{y''[x]+y[x]==Sin[x],{y'[1] == 0,y[2]==0}},y[x],x,IncludeSingularSolutions -> True]
\begin{align*} y(x)\to \frac {1}{4} (-2 (1+\sin (2)) (\tan (1)-1) \sin (x)-2 \cos (x) (x-1+\sin (2)-\cos (2))) \\ \end{align*}