Series for inverse cosine at 1

1 · John Cook · Sept. 6, 2022, 2:11 p.m.
Suppose you need to estimate the inverse cosine of an argument near 1. There’s a series for that: You can find this series, for example, here. This comes in handy, for example, when working with the analog of the Pythagorean theorem on a sphere. You could just use the series and be on your way. […] The post Series for inverse cosine at 1 first appeared on John D. Cook....