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JavaScript Math atan() Method

JavaScript Math atan() Method with example, javascript math methods, abs() method, round() method, ceil() method, floor() method, pow() method, random() method, sqrt() method, max() method, min() method, log() method, sin() method, cos() method, tan() method etc.

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JavaScript Math atan() method

The JavaScript math atan() method returns the arctangent of the given number in the form of radians. The value returned by atan() method lies between -Math.PI/2 to Math.PI/2.

Syntax

The atan() method is represented by the following syntax:

Math.atan(num)

Parameter

num - A number.

Return

The arctangent of the number.

JavaScript Math atan() method example

Here, we will understand atan() method through various examples.

Example 1

Let's see a simple example of atan() method.

<script>
document.writeln(Math.atan(-1)+"<br>");
document.writeln(Math.atan(0)+"<br>");
document.writeln(Math.atan(0.5)+"<br>");
document.writeln(Math.atan(1));
</script>
Test it Now

Output:

-0.7853981633974483
0
0.4636476090008061
0.7853981633974483

Example 2

Let's see an example of atan() method that contains infinity as an argument.

<script>
document.writeln(Math.atan(Infinity)+"<br>");
document.writeln(Math.atan(-Infinity));
</script>
Test it Now

Output:

1.5707963267948966
-1.5707963267948966

Example 3

Here, you can test atan() method with your own test cases.

<script>
function display()
{
  var x=document.getElementById("num").value;
document.getElementById("result").innerHTML=Math.atan(x);
}
</script>
<form>
  Enter a number: <input type="text" id="num">
  <input type="button"  onclick="display()" value="submit">
  </form>
  <p><span id="result"></span></p>
Test it Now
Next TopicJavaScript Math




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