## Mathematical Series

What happens when you had an infinite quantity of positive numbers?

That’s not a trivial question, because the answer is not straightforward. It depends on what kind of numbers you are summing!

## Sine & Cosine

The functions sin and cos are omnipresent in signal processing, and the same operations are performed most of the time: product, sum, integration…

Therefore, they deserve a cheat sheet with the most common properties and operations used in signal processing.