5.15 problem 19

Internal problem ID [1711]

Book: Differential equations and their applications, 3rd ed., M. Braun
Section: Section 1.10. Page 80
Problem number: 19.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_separable]

\[ \boxed {y^{\prime }-t \sqrt {1-y^{2}}=0} \]

Solution by Maple

Time used: 0.016 (sec). Leaf size: 12

dsolve(diff(y(t),t)=t*sqrt(1-y(t)^2),y(t), singsol=all)
 

\[ y \left (t \right ) = \sin \left (c_{1} +\frac {t^{2}}{2}\right ) \]

Solution by Mathematica

Time used: 0.221 (sec). Leaf size: 34

DSolve[y'[t]==t*Sqrt[1-y[t]^2],y[t],t,IncludeSingularSolutions -> True]
 

\begin{align*} y(t)\to \cos \left (\frac {t^2}{2}+c_1\right ) y(t)\to -1 y(t)\to 1 y(t)\to \text {Interval}[\{-1,1\}] \end{align*}