The original post in this thread is about not being able to find acos and atan.
When I search for log1p rust on Google I get a link to the libm crate, and when I search in the documentation I get log10. Neither gives a link to the standard library function which has been renamed ln_1p.
As for erf, why should I use statrs and not libm? (This is the disadvantage of not standardizing a standard function.)
Where do you think content on Google comes from? Ultimately people have to write it. The Rust documentation could be more discoverable.
Some programmers need to do mathematical computations. It's one of the things computers were literally invented to do. Other programmers probably never make f64 variables; they can skip that content.