The Math.acos( ) function in JavaScript is used to return the arccosine of a number in radians.
Math.acos(x)=arccos(x)=unique y, where y belongs to [0;pi] such that cos(y)=x
The Math.acos() method returns a numeric value between 0 and pi radians.
acos() is a static method of Math, therefore, it is always used as Math.acos(), rather than as a method of a Math object created.
Syntax:
Math.acos(value)
Parameters Used:
Value:A number in radians who arccosine you want to find.
Return Value:
The Math.acos() function returns the arccosine of the given number in radians.
Examples:
Input : Math.acos(1) Output : 0 Input : Math.acos(-1) Output : 3.141592653589793 Input : Math.acos(0) Output : 1.5707963267948966 Input : Math.acos(0.5) Output : 1.0471975511965979 Input : Math.acos(2) Output : NaN
- When 1 is passed as a parameter.
<
script
type
=
"text/javascript"
>
document.write("Output : " + Math.acos(1));
</
script
>
Output:
Output : 0
- When -1 is passed as a parameter.
<
script
type
=
"text/javascript"
>
document.write("Output : " + Math.acos(-1));
</
script
>
Output:
Output : 3.141592653589793
- When 0 is passed as a parameter.
<
script
type
=
"text/javascript"
>
document.write("Output : " + Math.acos(0));
</
script
>
Output:
Output : 1.5707963267948966
- When 0.5 is passed as a parameter.
<
script
type
=
"text/javascript"
>
document.write("Output : " + Math.acos(0.5));
</
script
>
Output:
Output : 1.0471975511965979
- When 2 is passed as a parameter.
<
script
type
=
"text/javascript"
>
document.write("Output : " + Math.acos(2));
</
script
>
Output:
Output : NaN
This article is attributed to GeeksforGeeks.org
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- When -1 is passed as a parameter.
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