@article{jmsa2014232,
author={{Mahdi, Hisham and Elatrash, Mohammed and ELmadhoun, Samar},
title={On Generalized Trigonometric Functions},
journal={Journal of Mathematical Sciences and Applications},
volume={2},
number={3},
pages={33--38},
year={2014},
url={http://pubs.sciepub.com/jmsa/2/3/2},
abstract={A new trigonometric functions called generalized trigonometric functions are perversely defined by a system of first order nonlinear ordinary differential equations with initial conditions. This system is related to the Hamilton system. In this paper, we define these functions using the equation <img src=image/abs1.png></img>, for m>0 We study the graphs, the trigonometric identities and some of common properties of these functions. We find the first derivatives which have different forms when  is even and when  is odd.},
doi={10.12691/jmsa-2-3-2}
publisher={Science and Education Publishing}
}