Hi,I need to show that the following equation is not solvable:Any idea? Thank you$\displaystyle \ddot{\theta}(t)+a\dot{\theta}(t)+b\sin\theta(t)+\ sin\left(ct\right)\sin\theta(t)=0 $
Hi,I need to show that the following equation is not solvable:Any idea? Thank you$\displaystyle \ddot{\theta}(t)+a\dot{\theta}(t)+b\sin\theta(t)+\ sin\left(ct\right)\sin\theta(t)=0 $