Math.acos() Method

Math acos() method is used to return the arccosine of a given number. Number value between the -1 to 1. If you give the other number are string it will return the NaN value.
Syntax:

Math.acos(n)

Example Code:

<script>
var positive = Math.acos(-1);
document.writeln('acosine of -1 : ' + positive + '</br></br>');
var nullVal = Math.acos(null);
document.writeln('arccosine of Null : ' + nullVal + '</br></br>');
    var nullVal = Math.acos(1);
document.writeln('arccosine of 1 : ' + nullVal + '</br></br>');
var actualVal = Math.acos(10);
document.writeln('arccosine of 10 : ' + actualVal + '</br></br>');
var stringVal = Math.acos('Labw3');
document.writeln('arccosine of Labw3 : ' + stringVal + '</br></br>');
</script>

Output:

acosine of -1 : 3.141592653589793
arccosine of Null : 1.5707963267948966
arccosine of 1 : 0
arccosine of 10 : NaN
arccosine of Labw3 : NaN

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