Applicable Analysis. 2019.
The article searched on mathematics and numerical solutions for the nonlinear pendulum (Chaotic pendulum). The numerical solution that was used for our research suitably the pseudospectral methods. With these equations, we studied and calculated on the interval [−1, 1], with boundary conditions already known. We used the software Mathematica 10.4 to calculate the results of the problems. © Siberian Federal University. All rights reserved.