I'm a new user to python. For part of my project, I have 2 signals which more or less are in the form of "sine wave" with the same frequency and amplitude.

I plot each one of them separately and its looks good.

But, when I wanted to average them, I found some strange effect on each other and I supposed that there is a Phase difference between them.

Can anyone help me to determine the phase difference between them? any suggestions?

Thanks