@article {10.3844/jmssp.2018.232.240, article_type = {journal}, title = {Theory of Exact Trigonometric Periodic Solutions to Quadratic Liénard Type Equations}, author = {Akande, Jean and Kêgnidé Adjaï , Damien Kolawolé and Monsia, Marc Delphin}, volume = {14}, year = {2018}, month = {Oct}, pages = {232-240}, doi = {10.3844/jmssp.2018.232.240}, url = {https://thescipub.com/abstract/jmssp.2018.232.240}, abstract = {A mathematical theory is developed through generalized Sundman transformation to show the existence of classes of quadratic Liénard type equations which admit exact and explicit general trigonometric solutions but with amplitude-dependent frequency. The application of the theory to compute also exact and explicit general periodic solutions to nonlinear differential equations like inverted Painlevé-Gambier equations in terms of trigonometric or Jacobian elliptic functions is highlighted by some illustrative examples.}, journal = {Journal of Mathematics and Statistics}, publisher = {Science Publications} }