public class UnitCircle
{
    public static void main(String[] args)
    {
 System.out.println("Radians: (cos, sin)");

        double angle = 0.0;
        double piDivideTwo = Math.PI/2.0;
        double pi = Math.PI;

        System.out.println(angle + ": " + Math.cos(angle) + ", " + Math.sin(angle) );

        double cosine = Math.cos(piDivideTwo);
        cosine = Math.round(cosine * 100) / 100.0;

        System.out.println(piDivideTwo + ": " + cosine +", " + Math.sin(piDivideTwo) );

        double sin = Math.sin(pi);
        sin = Math.round(sin *100) / 100.0;

        System.out.println(pi + ": " + Math.cos(pi) + ", " + sin );
    }
}