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JavaScript - Math.acos() Method



The JavaScript Math.acos() method returns arc cosine of a value. The return value will be in the range 0 through 𝜋.

Syntax

Math.acos(x);

Parameters

x Specify the value in range [-1, 1].

Return Value

Returns the arc cosine of the value.
If the x is not in the range of [-1, 1], it returns NaN.

Example:

In the example below, Math.acos() method is used to find out the arc cosine of a given value.

var txt;

txt = "Math.acos(0.25) = " + Math.acos(0.25) + "<br>";
txt = txt + "Math.acos(0.5) = " + Math.acos(0.5) + "<br>";
txt = txt + "Math.acos(1) = " + Math.acos(1) + "<br>";

The output (value of txt) after running above script will be:

Math.acos(0.25) = 1.318116071652818
Math.acos(0.5) = 1.0471975511965979
Math.acos(1) = 0

❮ JavaScript - Math Object

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