Java tutorial
public class Main { public static void main(String[] args) { double d1 = (90 * Math.PI) / 180, d2 = 0.0; double d3 = (1.0) / (0.0), d4 = -(1.0) / (0.0); System.out.println("hyperbolic tangent of d1 = " + StrictMath.tanh(d1)); System.out.println("hyperbolic tangent of d2 = " + StrictMath.tanh(d2)); System.out.println("hyperbolic tangent of d3 = " + StrictMath.tanh(d3)); System.out.println("hyperbolic tangent of d4 = " + StrictMath.tanh(d4)); } }