78.6.3 problem 2 (c)

Internal problem ID [18092]
Book : DIFFERENTIAL EQUATIONS WITH APPLICATIONS AND HISTORICAL NOTES by George F. Simmons. 3rd edition. 2017. CRC press, Boca Raton FL.
Section : Chapter 2. First order equations. Section 10 (Linear equations). Problems at page 82
Problem number : 2 (c)
Date solved : Thursday, March 13, 2025 at 11:35:52 AM
CAS classification : [_linear]

\begin{align*} \left (x^{2}+1\right ) y^{\prime }+2 x y&=\cot \left (x \right ) \end{align*}

✓ Maple. Time used: 0.000 (sec). Leaf size: 17

ode:=(x^2+1)*diff(y(x),x)+2*x*y(x) = cot(x); 
dsolve(ode,y(x), singsol=all);
 

\[ y = \frac {\ln \left (\sin \left (x \right )\right )+c_1}{x^{2}+1} \]

✓ Mathematica. Time used: 0.041 (sec). Leaf size: 19

ode=(1+x^2)*D[y[x],x]+2*x*y[x]==Cot[x]; 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\[ y(x)\to \frac {\log (\sin (x))+c_1}{x^2+1} \]

✓ Sympy. Time used: 0.492 (sec). Leaf size: 24

from sympy import * 
x = symbols("x") 
y = Function("y") 
ode = Eq(2*x*y(x) + (x**2 + 1)*Derivative(y(x), x) - 1/tan(x),0) 
ics = {} 
dsolve(ode,func=y(x),ics=ics)
 

\[ y{\left (x \right )} = \frac {C_{1} - \frac {\log {\left (\frac {1}{\cos ^{2}{\left (x \right )}} \right )}}{2} + \log {\left (\tan {\left (x \right )} \right )}}{x^{2} + 1} \]