Hyperbolic java in pgm

Hyperbolic.java

public class Hyperbolic

{

                public static double cosh(double x)

   {

        return (Math.exp(x) + Math.exp(-x)) / 2.0;

    }

                public static double sinh(double x)

   {

        return (Math.exp(x) - Math.exp(-x)) / 2.0;

    }

                public static double tanh(double x)

    {

        return sinh(x) / cosh(x);

    }

                 public static void main(String[] args)

                  {

        double x = Double.parseDouble(args[0]);

        StdOut.printf("sinh(%f) = %f\n", x, sinh(x));

        StdOut.printf("cosh(%f) = %f\n", x, cosh(x));

        StdOut.printf("tanh(%f) = %f\n", x, tanh(x));

    }

}