JavaScript Math cos() method

The JavaScript math cos() method returns the cosine of the given number. The value returned by cos() method ranges -1 to 1, which represents the cosine of the angle.

Syntax

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

Parameter

num - A number.

Return

The cosine of a number.

JavaScript Math cos() method example

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

Example 1

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

<script>
document.writeln(Math.cos(1)+"<br>");
document.writeln(Math.cos(2));
</script>

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Output:

0.5403023058681398
-0.4161468365471424

Example 2

In this example, we will use cos() method with negative numbers.

<script>
document.writeln(Math.cos(-1)+"<br>");
document.writeln(Math.cos(-0.5));
</script>

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Output:

0.5403023058681398
0.8775825618903728

Example 3

Let's see cos() method with some different test cases.

<script>
document.writeln(Math.cos(0)+"<br>");
document.writeln(Math.cos(Math.PI));
</script>

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Output:

1
-1

Example 4

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

<script>
function display()
{
  var x=document.getElementById("num").value;
document.getElementById("result").innerHTML=Math.cos(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

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