JavaScript Math acos() method

The JavaScript math acos() method returns the arccosine of the given number in the form of radians. The acos() method must be in the range -1 to 1, otherwise it returns NaN.

Syntax

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

Parameter

num – A number.

Return

The arccosine of the number.

JavaScript Math acos() method example

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

Example 1

Let’s see a simple example of acos() method.

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Output:

3.141592653589793  1.5707963267948966  1.0471975511965979  0  

Example 2

Let’s see some cases where acos() method returns NaN.

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Output:

NaN  NaN  NaN  

Example 3

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

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