Periodic and solitary wave solutions of Kawahara and modified Kawahara equations by using Sine-Cosine method

In this paper, we establish exact solutions for nonlinear evolution equations. The sine-cosine method is used to construct periodic and solitary wave solutions of the Kawahara and modified Kawahara equations. These solutions may be important of significance for the explanation of some practical physical problems. (C) 2006 Elsevier Ltd. All rights reserved.