68.1.39 problem 46

Internal problem ID [17106]
Book : INTRODUCTORY DIFFERENTIAL EQUATIONS. Martha L. Abell, James P. Braselton. Fourth edition 2014. ElScAe. 2014
Section : Chapter 1. Introduction to Differential Equations. Exercises 1.1, page 10
Problem number : 46
Date solved : Thursday, October 02, 2025 at 01:43:15 PM
CAS classification : [_quadrature]

\begin{align*} y^{\prime }&=\sin \left (x \right )^{3} \tan \left (x \right ) \end{align*}

✓ Maple. Time used: 0.001 (sec). Leaf size: 22

ode:=diff(y(x),x) = sin(x)^3*tan(x); 
dsolve(ode,y(x), singsol=all);
 

\[ y = -\frac {\sin \left (x \right )^{3}}{3}-\sin \left (x \right )+\ln \left (\sec \left (x \right )+\tan \left (x \right )\right )+c_1 \]

✓ Mathematica. Time used: 0.009 (sec). Leaf size: 23

ode=D[y[x],x]==Sin[x]^3*Tan[x]; 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\begin{align*} y(x)&\to \text {arctanh}(\sin (x))-\frac {1}{3} \sin ^3(x)-\sin (x)+c_1 \end{align*}

✓ Sympy. Time used: 0.112 (sec). Leaf size: 31

from sympy import * 
x = symbols("x") 
y = Function("y") 
ode = Eq(-sin(x)**3*tan(x) + Derivative(y(x), x),0) 
ics = {} 
dsolve(ode,func=y(x),ics=ics)
 

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