74.5.17 problem 17

Internal problem ID [15910]
Book : INTRODUCTORY DIFFERENTIAL EQUATIONS. Martha L. Abell, James P. Braselton. Fourth edition 2014. ElScAe. 2014
Section : Chapter 2. First Order Equations. Exercises 2.3, page 49
Problem number : 17
Date solved : Monday, March 31, 2025 at 02:12:56 PM
CAS classification : [_linear]

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

✓ Maple. Time used: 0.002 (sec). Leaf size: 15

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

\[ y = \frac {\sin \left (x \right )}{3}+c_1 \csc \left (x \right )^{2} \]

✓ Mathematica. Time used: 0.039 (sec). Leaf size: 19

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

\[ y(x)\to \frac {\sin (x)}{3}+c_1 \csc ^2(x) \]

✓ Sympy. Time used: 1.598 (sec). Leaf size: 14

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

\[ y{\left (x \right )} = \frac {C_{1}}{\sin ^{2}{\left (x \right )}} + \frac {\sin {\left (x \right )}}{3} \]