1.14 problem 13

Internal problem ID [3277]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 1
Problem number: 13.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_separable]

\[ \boxed {y^{\prime }-y \cot \left (x \right )=0} \]

Solution by Maple

Time used: 0.0 (sec). Leaf size: 8

dsolve(diff(y(x),x) = y(x)*cot(x),y(x), singsol=all)
 

\[ y \left (x \right ) = \sin \left (x \right ) c_{1} \]

Solution by Mathematica

Time used: 0.036 (sec). Leaf size: 15

DSolve[y'[x]==y[x]*Cot[x],y[x],x,IncludeSingularSolutions -> True]
 

\begin{align*} y(x)\to c_1 \sin (x) y(x)\to 0 \end{align*}