I was curious about the long-term stability of the cited HAKMEM sin/cos generator. I found an overview here: https://news.ycombinator.com/item?id=3111501 (EDIT: I'm still not sure about stability, apparently it is stable in exact arithmetic under certain conditions.) Coincidentally it is related to the Verlet integration video I posted last week: https://news.ycombinator.com/item?id=46253592
Yeah, it is exact in this specific circumstance. But yes, it's exactly the same trick; I also enjoyed that video in my Youtube recommender feed last week!