7.3 problem Ex 3

Internal problem ID [10132]

Book: An elementary treatise on differential equations by Abraham Cohen. DC heath publishers. 1906
Section: Chapter 2, differential equations of the first order and the first degree. Article 14. Equations reducible to linear equations (Bernoulli). Page 21
Problem number: Ex 3.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_separable]

\[ \boxed {y^{\prime } \sin \left (y\right )+\sin \left (x \right ) \cos \left (y\right )-\sin \left (x \right )=0} \]

Solution by Maple

Time used: 0.234 (sec). Leaf size: 14

dsolve(sin(y(x))*diff(y(x),x)+sin(x)*cos(y(x))=sin(x),y(x), singsol=all)
 

\[ y \left (x \right ) = \arccos \left ({\mathrm e}^{-\cos \left (x \right )} c_{1} +1\right ) \]

Solution by Mathematica

Time used: 8.035 (sec). Leaf size: 31

DSolve[Sin[y[x]]*y'[x]+Sin[x]*Cos[y[x]]==Sin[x],y[x],x,IncludeSingularSolutions -> True]
 

\begin{align*} y(x)\to 0 \\ y(x)\to 2 \arcsin \left (e^{\frac {1}{4} (-2 \cos (x)+c_1)}\right ) \\ y(x)\to 0 \\ \end{align*}