JavaScript Math atan2( ) Method

Below is the example of the Math atan2() Method. 

• Example: When y-coordinate is greater than x-coordinate:

Output: 

1.4056476493802699

The Math.atan2() method is used to return the arctangent of the quotient of its arguments. The Math.atan2() method returns a numeric value between -Π and Π representing the angle theta of an (x, y) point and the positive x-axis. This is the counterclockwise angle, measured in radians, between the positive X-axis, and the point (x, y).

Syntax:  

Math.atan2(value1, value2)

Parameters: This method accepts two parameters as mentioned above and described below:  

• value1: This parameter represents the y-coordinate.
• value2: represents x-coordinate of the point (x,y).

Returns: It returns the arctangent of the quotient of its arguments.

Below examples illustrate the Math.atan2() method in JavaScript:  

• Example 1:

Input : Math.atan2(90, 15);  
Output : 1.4056476493802699

• Example 2:

Input : Math.atan2(15, 90);
Output : 0.16514867741462683

More codes for the above method are as follows:

Program 1: When y-coordinate is smaller than x-coordinate  

Output: 

0.16514867741462683

Program 2: When y-coordinate is same as x-coordinate 

Output: 

0.7853981633974483

Supported Browsers: 

• Google Chrome 1 and above
• Internet Explorer 4 and above
• Firefox 1 and above
• Opera 3 and above
• Safari 1 and above