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JavaScript Math atan2() Method

Last Updated : 01 Aug, 2023
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Javascript 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 are examples of the Math atan2() Method. 

Example 1: When the y-coordinate is greater than the x-coordinate:

JavaScript
console.log(Math.atan2(90, 15));   

Output
1.4056476493802699

Example 2: When y-coordinate is smaller than x-coordinate  

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

Output
0.16514867741462683

Example 3: When y-coordinate is the same as x-coordinate 

JavaScript
 console.log(Math.atan2(90, 90));   

Output
0.7853981633974483

We have a complete list of Javascript Math Objects methods, to check those please go through this Javascript Math Object Complete reference article.

Supported Browsers: 

  • Google Chrome 1 and above
  • Firefox 1 and above
  • Opera 3 and above
  • Safari 1 and above 

S

Shubrodeep Banerjee
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Article Tags :
  • Misc
  • JavaScript
  • Web Technologies
  • javascript-math
  • JavaScript-Methods
Practice Tags :
  • Misc

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