রাস্ট atan2 গণিত

fn main() {
    println!("{}", (0.5 as f64).atan2(0.4 as f64));
    println!("{}", (0.5 as f64).atan2(0.5 as f64));
    println!("{}", (0.5 as f64).atan2(0.6 as f64));
}