Mastering the sin() Method in Java: A Complete Tutorial

Description

The method returns the sine of the specified double value.

On this tutorial, we will be showing a java example on how to use the sin(double a) method of Math Class. The sin(double a) returns the trigonometric sine of the method argument value. It must be noted that the parameter is in radians, however, if your source value is a degree which is always the case for real world applications the handy Math.toRadians() method will be helpful for the conversion.

 

• If the argument is NaN or an infinity, then the result is NaN.
• If the argument is zero, then the result is a zero with the same sign as the argument.

Most of the methods of the Math class is static and the sin() method is no exception. Thus don’t forget that in order to call this method, you don’t have to create a new object instead call it using Math.sin(a).

Syntax

double sin(double d)

Parameters

Here is the detail of parameters ?

• d ? A double data type. An angle, in radians.

Return Value

• This method returns the sine of the specified double value.

Requires Java 1.0 and up

Example

public class MathSin {

   public static void main(String args[]) {
      double degrees = 45.0;
      double radians = Math.toRadians(degrees);

      System.out.format("The value of pi is %.4f%n", Math.PI);
      System.out.format("The sine of %.1f degrees is %.4f%n", degrees, Math.sin(radians));
   }
}

Output

The value of pi is 3.1416
The sine of 45.0 degrees is 0.7071
Press any key to continue . . .

Example

Below is a java code demonstrates the use of sin() method of Math class. The example presented might be simple however it shows the behavior of the sin() method.

import java.util.Scanner;

/*
 * This example source code demonstrates the use of
 * sin() method of Math class
 */

public class MathSineExample {

	public static void main(String[] args) {

		// Ask for user input
		System.out.print("Enter an angle in degrees:");

		// use scanner to read the console input
		Scanner scan = new Scanner(System.in);

		// Assign the user to String variable
		String s = scan.nextLine();

		// close the scanner object
		scan.close();

		// convert the string input to double
		double value = Double.parseDouble(s);
		// convert the value to radians
		double valueRadians = Math.toRadians(value);

		// get the sine of the angle
		double sineValue = Math.sin(valueRadians);
		System.out.println("sine of " + s + " is " + sineValue);

	}

}

Output

Enter an angle in degrees:90
sine of 90 is 1.0
Press any key to continue . . .

The above java example source code demonstrates the use of sin() method of Math class. We simply ask for user input and we use the Scanner class to parse it. Since we have used the nextLine() method to get the console value, and the return data type is String thus we have used the Double.parseDouble() to transform it into double. We have to convert it first to double because the sin() method accepts double method argument. After transforming into double we have also used Math.toRadians() to convert the input to radians which are the required method argument.

Java sin() method Example

The Java Math.sin Function allows you to find the trigonometry Sine for the numeric values. In this Java program, We are going to find the Sine values of both positive and negative values and display the output

// Java sin Function


public class SinMethod {
	public static void main(String[] args) {
		double x = Math.sin(1.96 - 4.65 + 2.98);
		System.out.println("Sine value =  " + x);

		System.out.println("\nSine value of Positive Number = " + Math.sin(10.25));
		System.out.println("Sine value of Positive Number=  " + Math.sin(2.28));

		System.out.println("\nSine value of Negative Number =  " + Math.sin(-4.85));
		System.out.println("Sine value of Negative Number =  " + Math.sin(-7.95));

		double m = Math.toRadians(30);
		System.out.println("\nSine value of Negative Number = " + Math.sin(m));
	}
}

Output

Sine value =  0.28595222510483514

Sine value of Positive Number = -0.7346984304047954
Sine value of Positive Number=  0.758880708180922

Sine value of Negative Number =  0.9905465359667133
Sine value of Negative Number =  -0.9953937772576199

Sine value of Negative Number = 0.49999999999999994
Press any key to continue . . .

Example

The Java Math.sin Function allows you to find the trigonometry Sine for the numeric values. In this Java program, We are going to find the Sine values of both positive and negative values and display the output

// Java sin Function


public class SinMethod {
	public static void main(String[] args) {
		double x = Math.sin(1.96 - 4.65 + 2.98);
		System.out.println("Sine value =  " + x);

		System.out.println("\nSine value of Positive Number = " + Math.sin(10.25));
		System.out.println("Sine value of Positive Number=  " + Math.sin(2.28));

		System.out.println("\nSine value of Negative Number =  " + Math.sin(-4.85));
		System.out.println("Sine value of Negative Number =  " + Math.sin(-7.95));

		double m = Math.toRadians(30);
		System.out.println("\nSine value of Negative Number = " + Math.sin(m));
	}
}

Output

Sine value =  0.28595222510483514

Sine value of Positive Number = -0.7346984304047954
Sine value of Positive Number=  0.758880708180922

Sine value of Negative Number =  0.9905465359667133
Sine value of Negative Number =  -0.9953937772576199

Sine value of Negative Number = 0.49999999999999994
Press any key to continue . . .

Java sin on Array example

In this Java program we will show you, How to find the sine values of bulk data. Here, we are going to declare an array of double type and find the sine values of an array elements.

public class SinMethodOnArray {
	public static void main(String[] args) {

		double [] myArray = {0, 1, 30, 45, 60, 75, 90, 120, 180, 240, 360};

		for (int i = 0; i < myArray.length; i++) {
			System.out.format("Sine value of Array Element %.2f = %.4f\n", myArray[i], Math.sin(myArray[i]));
		}
	}
}

Output

Sine value of Array Element 0.00 = 0.0000
Sine value of Array Element 1.00 = 0.8415
Sine value of Array Element 30.00 = -0.9880
Sine value of Array Element 45.00 = 0.8509
Sine value of Array Element 60.00 = -0.3048
Sine value of Array Element 75.00 = -0.3878
Sine value of Array Element 90.00 = 0.8940
Sine value of Array Element 120.00 = 0.5806
Sine value of Array Element 180.00 = -0.8012
Sine value of Array Element 240.00 = 0.9454
Sine value of Array Element 360.00 = 0.9589
Press any key to continue . . .

Java sin Function on Arraylist example

In this Java program we are going to declare an arraylist of double type and find the sine values of list elements.

import java.util.ArrayList;

public class SinMethodOnArrayList {
	public static void main(String[] args) {

		ArrayList myList = new ArrayList(5);
		myList.add(30.45);
		myList.add(45.64);
		myList.add(120.60);
		myList.add(180.75);
		myList.add(90.68);
		myList.add(14.98);

		for (double x : myList) {
			System.out.format("Sine value of ArrayList Item %.2f =  %.4f \n", x, Math.sin(x));
		}
	}
}

Output

Sine value of ArrayList Item 30.45 =  -0.8226
Sine value of ArrayList Item 45.64 =  0.9962
Sine value of ArrayList Item 120.60 =  0.9389
Sine value of ArrayList Item 180.75 =  -0.9941
Sine value of ArrayList Item 90.68 =  0.4134
Sine value of ArrayList Item 14.98 =  0.6654
Press any key to continue . . .

ANALYSIS

First, We declared an ArrayList of integer type and assigned some random values.

ArrayList myList = new ArrayList(5);
myList.add(30.45);
myList.add(45.64);
myList.add(120.60);
myList.add(180.75);
myList.add(90.68);
myList.add(14.98);

Next, We used the For Loop to iterate the double values in ArrayList

for (double x : myList) {

Following statements will print the output. If you observe the code snippet, we used the Math.sin Function directly inside the System.out.format statement. Here, compiler will call the java math.sin method ( static double sin(double x) ) to find the corresponding Sine values.

System.out.format("Sine value of ArrayList Item %.2f =  %.4f \n", x, Math.sin(x));