How to use atan2 in JavaScript
In this article, I will explain use of atan2() method in JavaScript.
JavaScript atan2() Method
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atan() method of math object returns the arctangent of the quotient of its arguments.
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atan() method returns a numeric value between -pi/2 and pi/2 radians representing the angle theta of an (x,y) point.
- In atan2(),the x coordinate is passed as the second argument and, the y coordinate is passed as the first argument.
Syntax
Example
In the following example show to how atan2() method with (12,6) coordinate can be used.
<!DOCTYPE html>
<html>
<body>
<h3 style="background-color:Silver">atan2() Method Example</h3>
<p id="demo">Click the button to display the arctangent of 12/6</p>
<button onclick="myFunction()">Click</button>
<script type="text/javascript">
function myFunction() {
document.getElementById("demo").innerHTML = Math.atan2(12, 6);
}
</script>
</body>
</html>
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Output1
Output2
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