Internal problem ID [14135]
Book: INTRODUCTORY DIFFERENTIAL EQUATIONS. Martha L. Abell, James P. Braselton.
Fourth edition 2014. ElScAe. 2014
Section: Chapter 2. First Order Equations. Exercises 2.1, page 32
Problem number: 11.
ODE order: 1.
ODE degree: 1.
CAS Maple gives this as type [_separable]
\[ \boxed {y^{\prime }-y \tan \left (t \right )=0} \] With initial conditions \begin {align*} [y \left (0\right ) = 1] \end {align*}
✓ Solution by Maple
Time used: 0.0 (sec). Leaf size: 6
dsolve([diff(y(t),t)=y(t)*tan(t),y(0) = 1],y(t), singsol=all)
\[ y \left (t \right ) = \sec \left (t \right ) \]
✓ Solution by Mathematica
Time used: 0.042 (sec). Leaf size: 7
DSolve[{y'[t]==y[t]*Tan[t],{y[0]==1}},y[t],t,IncludeSingularSolutions -> True]
\[ y(t)\to \sec (t) \]