take the secant of a number in rust

To take the secant of a number in Rust, you can use the sec function provided by the std::f64 module. Here's an example:

main.rs
fn main() {
    let x = 2.0;
    let sec_x = 1.0 / x.cos();
    println!("sec({}) = {}", x, sec_x);
}
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In this example, we first define the value we want to take the secant of as x. We then use the cos function to calculate the cosine of x, and then take the reciprocal of the result to get the secant. Finally, we use println! to display the result.

Note that the cos function expects its argument to be in radians. If your input is in degrees, you can convert it to radians using the to_radians function provided by the std::f64 module:

main.rs
fn main() {
    let x_degrees = 45.0;
    let x_radians = x_degrees.to_radians();
    let sec_x = 1.0 / x_radians.cos();
    println!("sec({} degrees) = {}", x_degrees, sec_x);
}
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