In this study, the numerical solution of the ordinary kind of differential
equation for a simple pendulum with large-angle of oscillation was
introduced to obtain the time period. The analytical solution is obtained in
terms of elliptic functions, and numerical solution of the problem was
achieved by using two numerical quadrature methods, namely, Simpson?s 3/8
and Boole?s method. The period of a simple pendulum with large angle is
presented; a comparison has been carried out between the analytical solution
and the numerical integration results. In the case of error analysis,
absolute and relative errors of the problem have been presented. A numerical
algorithm has been developed by Matlab software 2013R and used for analyzing
the result. It is established that the results of the comparison guaranty
the ability and the accuracy of the present method.