Calculate Hyperbolic cosine in Java

/*  w  w  w .jav a  2s .c  om*/
public class Main {
  public static void main(String[] args) {
    // Obtain angle in degrees from user
    double degs = 20d;
    // Convert degrees to radian
    double rads = Math.toRadians(degs);
    
    // Calculate Hyperbolic cosine
    double cosHA = (Math.exp(rads) + Math.exp(-rads)) / 2;
    System.out.println("Hyperbolic cosine = " + cosHA);
    
  }
}