3.18 problem 72

Internal problem ID [3336]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 3
Problem number: 72.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_Riccati]

\[ \boxed {y^{\prime }-\left (3-\cot \left (x \right )\right ) y-y^{2} \sin \left (x \right )=-4 \csc \left (x \right )} \]

Solution by Maple

Time used: 0.015 (sec). Leaf size: 90

dsolve(diff(y(x),x)+4*csc(x) = (3-cot(x))*y(x)+y(x)^2*sin(x),y(x), singsol=all)
 

\[ y \left (x \right ) = \frac {-\frac {4 c_{1} \left (\cos \left (x \right )+i \sin \left (x \right )\right )^{-\frac {5 i}{2}}}{c_{1} \left (\cos \left (x \right )+i \sin \left (x \right )\right )^{-\frac {5 i}{2}}+\left (\cos \left (x \right )+i \sin \left (x \right )\right )^{\frac {5 i}{2}}}+\frac {\left (\cos \left (x \right )+i \sin \left (x \right )\right )^{\frac {5 i}{2}}}{c_{1} \left (\cos \left (x \right )+i \sin \left (x \right )\right )^{-\frac {5 i}{2}}+\left (\cos \left (x \right )+i \sin \left (x \right )\right )^{\frac {5 i}{2}}}}{\sin \left (x \right )} \]

Solution by Mathematica

Time used: 0.264 (sec). Leaf size: 32

DSolve[y'[x]+4 Csc[x]==(3-Cot[x])y[x]+y[x]^2 Sin[x],y[x],x,IncludeSingularSolutions -> True]
 

\begin{align*} y(x)\to \left (-4+\frac {1}{\frac {1}{5}+c_1 e^{5 x}}\right ) \csc (x) y(x)\to -4 \csc (x) \end{align*}