Java tutorial
public class Main { public static void main(String[] args) { double x = 45; double y = -180; // convert them in radians x = Math.toRadians(x); y = Math.toRadians(y); // print the tangent of these doubles System.out.println("Math.tan(" + x + ")=" + Math.tan(x)); System.out.println("Math.tan(" + y + ")=" + Math.tan(y)); } }