There’s more to trig than just sin and cos. For example, atan2 is used a lot to find the angle between 2 points. This is what I have in my AngleTo and VelocityToAngle Bundles.
You can use different forms depending what you want to know about the circle.
Below is all 6 trig functions on a graph. Each have their own purpose depending on the answer that you are looking for.
Here is a deeper dive on how the Mathmatics works:
How does the orbit example work? - #7 by JR_01
