pub const FRAC_1_PI: f64 = 0.318309886183790671537767526745028724f64; // 0.31830988618379069f64
1/π
© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/f64/consts/constant.FRAC_1_PI.html