Internal problem ID [3383]
Book: Ordinary differential equations and their solutions. By George Moseley Murphy.
1960
Section: Various 5
Problem number: 126.
ODE order: 1.
ODE degree: 1.
CAS Maple gives this as type [_separable]
\[ \boxed {y^{\prime }+\csc \left (2 x \right ) \sin \left (2 y\right )=0} \]
✓ Solution by Maple
Time used: 0.406 (sec). Leaf size: 80
dsolve(diff(y(x),x)+csc(2*x)*sin(2*y(x)) = 0,y(x), singsol=all)
\[ y \left (x \right ) = \frac {\arctan \left (-\frac {2 \sin \left (2 x \right ) c_{1}}{c_{1}^{2} \cos \left (2 x \right )-c_{1}^{2}-\cos \left (2 x \right )-1}, \frac {c_{1}^{2} \cos \left (2 x \right )-c_{1}^{2}+\cos \left (2 x \right )+1}{c_{1}^{2} \cos \left (2 x \right )-c_{1}^{2}-\cos \left (2 x \right )-1}\right )}{2} \]
✓ Solution by Mathematica
Time used: 0.456 (sec). Leaf size: 68
DSolve[y'[x]+Csc[2 x] Sin[2 y[x]]==0,y[x],x,IncludeSingularSolutions -> True]
\begin{align*} y(x)\to -\frac {1}{2} \arccos (-\tanh (\text {arctanh}(\cos (2 x))+2 c_1)) \\ y(x)\to \frac {1}{2} \arccos (-\tanh (\text {arctanh}(\cos (2 x))+2 c_1)) \\ y(x)\to 0 \\ y(x)\to -\frac {\pi }{2} \\ y(x)\to \frac {\pi }{2} \\ \end{align*}