java.lang.Math.sin(double a) java.lang.Math.signum(float f) java.lang.Math.sinh(double x) java.lang.Math.sin(double a) package com.codingdict; import java.lang.*; public class MathDemo { public static void main(String[] args) { // get two double numbers numbers double x = 45; double y = -180; // convert them to radians x = Math.toRadians(x); y = Math.toRadians(y); // print the trigonometric sine for these doubles System.out.println("Math.sin(" + x + ")=" + Math.sin(x)); System.out.println("Math.sin(" + y + ")=" + Math.sin(y)); } } java.lang.Math.signum(float f) java.lang.Math.sinh(double x)