DSP Robotics Support

Hello, Guys, tell me, can I do that's a plugin, my knowledge is not enough ... and the module is needed. If someone is not difficult to help, or even be channeled.
A beautiful example:
http://www.fourier-series.com/fourierse ... index.html

what do you want to do with this? It's just a trigonometric identity:

Thank you very much, helped