How Calculus Works

An eas[y] way [to calculate pi is] to use a Sine Function. I saw a person use them and got several digits quickly.  {,,,}[P]i is just a number that tells us a thing is a perfect circle. As everything, from area to circumference--even different pieces of it--ratio to pi if something's a circle. That's also how Sine functions intuit rates of change in calculus, is by telling you the difference off of pi a thing is from the slope on the curve. Which basically gets calculated from the curve of the parameter, but also works in Areas too. Which is neat, because when you have a piece of pie, it's actually equal to pi, but there's straight lines on the parameter, and actually the number pi is [completed] from the parameter of the circle. [Just like it would be in calculus, when you factor in a rate of change, and a slope, the area beneath it is shaped through the curve; and that area is useful in attaining real, physical measurements, such as distance in acceleration versus speed. And of course, one takes different sums of the series, and completes it through intuiting the logic by a formula.]