Function cosh 

pub fn cosh(arg: &Expression) -> Expression

Evaluate hyperbolic cosine cosh(x)

Mathematical Definition

cosh(x) = (e^x + e^(-x)) / 2

Arguments

• arg - Expression to compute cosh of

Returns

Hyperbolic cosine expression

Examples

use mathhook_core::functions::elementary::hyperbolic_eval::cosh;
use mathhook_core::expr;

let result = cosh(&expr!(0));
assert_eq!(result, expr!(1));