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Constant std::f64::consts::FRAC_1_SQRT_2

pub const FRAC_1_SQRT_2: f64

1/sqrt(2)

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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_SQRT_2.html