[want2know]

The first comment is about the constant Tau.

I never heard of Tau so I had to look it up and came across this: "pi is a confusing and unnatural choice for the circle constant."

So now I am confused.

If a cicle has a diameter of 1 the circumference is pi.

Can someone explain in what context pi might be confusing?

Because the sinus/radians always relates to the radius instead of the diameter?

[terlisimo]

The main arguments are that a circle is defined by its radius, not its diameter, and that in most cases when you reference Pi in mathematics/engineering you actually use 2Pi.

From the horse's mouth: https://www.youtube.com/watch?v=2hhjsSN-AiU