I was trying to explain what Tau is and how sin works to someone, then I found this amazing site:
https://www.mathsisfun.com/sine-cosine-tangent.html
There’s an interactive circle in this website, it has a “Degrees” button, click on it, this will turn the degrees into radians, this is pretty cool because you can now see why we are multiplying by Tau (around 6.283) in a very graphical way, this also digs deep into other subjects like Tangent and Cosine which is nice to have in your math arsenal for development.