Write a program that plots the sine function in red and the

Write a program that plots the sine function in red and the cosine function in blue. Polyline polyline = new Polyline(); ObservableList list = polyline.getPoints(); double scaleFactor = 50; for (int x = -170; x

Solution

import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.Polygon;
import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Exercise14_19 extends JFrame
{

public Exercise14_19() {
setLayout(new BorderLayout());
add(new DrawSine(), BorderLayout.CENTER);
}

public static void main(String[] args)
{
Exercise14_19 frame = new Exercise14_19();
frame.setSize(400, 300);
frame.setTitle(\"Exercise14_19\");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setVisible(true);

}

class DrawSine extends JPanel
{

double f(double x)
{
return Math.sin(x);
}

double gCos(double y)
{
return Math.cos(y);
}

protected void paintComponent(Graphics g)
{
super.paintComponent(g);

g.drawLine(10, 100, 380, 100);
g.drawLine(200, 30, 200, 190);

g.drawLine(380, 100, 370, 90);
g.drawLine(380, 100, 370, 110);
g.drawLine(200, 30, 190, 40);
g.drawLine(200, 30, 210, 40);

g.drawString(\"X\", 360, 80);
g.drawString(\"Y\", 220, 40);

Polygon p = new Polygon();
Polygon p2 = new Polygon();

for (int x = -170; x <= 170; x++)
{
p.addPoint(x + 200, 100 - (int) (50 * f((x / 100.0) * 2 * Math.PI)));

}

for (int x = -170; x <= 170; x++)
{
p2.addPoint(x + 200, 100 - (int) (50 * gCos((x / 100.0) * 2 * Math.PI)));

}

g.setColor(Color.red);
g.drawPolyline(p.xpoints, p.ypoints, p.npoints);
g.drawString(\"-2\\u03c0\", 95, 115);
g.drawString(\"-\\u03c0\", 147, 115);
g.drawString(\"\\u03c0\", 253, 115);
g.drawString(\"2\\u03c0\", 305, 115);
g.drawString(\"0\", 200, 115);

g.setColor(Color.blue);
g.drawPolyline(p2.xpoints, p2.ypoints, p2.npoints);

}
}