/sci/ - Science & Math

https://youtu.be/3d6DsjIBzJ4?t=592
9:52 if the video doesn't automatically start there

why is it that, in 3b1b's animations for a taylor polynomial, the graph of his polynomial continues to "hug"/approximate the parent graph (cos(x) in this case) when he shifts the function via (x-π), but when I try to do it with graphing software, it just translates the polynomial by π units right (as it should)?

What is he doing to the actual polynomial behind the scenes to get it to slide over the parent function instead of translating along the x-axis?