code: public class Trig {
          public static void main(String[] args) {
                  //Pi / 4 is 45 degrees. All answers should be the same.
                  double radians = Math.PI / 4;
                  double degrees = 45.0;
                  //sine
                  System.out.println(Math.sin(radians) + " " + Math.sin(Math.toRadians(degrees)));
                  //cosine
                  System.out.println(Math.cos(radians) + " " + Math.cos(Math.toRadians(degrees)));
                  //tangent
                  System.out.println(Math.tan(radians) + " " + Math.tan(Math.toRadians(degrees)));
                  //arcsine
                  double arcsin = Math.asin(Math.sin(radians));
                  System.out.println(arcsin + " " + Math.toDegrees(arcsin));
                  //arccosine
                  double arccos = Math.acos(Math.cos(radians));
                  System.out.println(arccos + " " + Math.toDegrees(arccos));
                  //arctangent
                  double arctan = Math.atan(Math.tan(radians));
                  System.out.println(arctan + " " + Math.toDegrees(arctan));
          }
  }
  