take the cosine of a number in rust

To take the cosine of a number in Rust, you can use the built-in cos function available in the std::f64 module. Here's an example:

main.rs
fn main() {
    let x = 2.0;
    let cos_x = x.cos();
    println!("The cosine of {} is {}", x, cos_x);
}
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This will output:

main.rs
The cosine of 2 is -0.4161468365471424
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Note that the cos function takes an argument in radians, so you may need to convert degrees to radians first.