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The Math.acos()
function returns the arccosine (in radians) of a number, that is
Syntax
Math.acos(x)
Parameters
x
- A number.
Return value
The arccosine (in radians) of the given number if it's between -1 and 1; otherwise, NaN
.
Description
The Math.acos()
method returns a numeric value between 0 and π radians for x
between -1 and 1. If the value of x
is outside this range, it returns NaN
.
Because acos()
is a static method of Math
, you always use it as Math.acos()
, rather than as a method of a Math
object you created (Math
is not a constructor).
Examples
Using Math.acos()
Math.acos(-2); // NaN Math.acos(-1); // 3.141592653589793 Math.acos(0); // 1.5707963267948966 Math.acos(0.5); // 1.0471975511965979 Math.acos(1); // 0 Math.acos(2); // NaN
For values less than -1 or greater than 1, Math.acos()
returns NaN
.
Specifications
Specification | Status | Comment |
---|---|---|
ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.0. |
ECMAScript 5.1 (ECMA-262) The definition of 'Math.acos' in that specification. |
Standard | |
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Math.acos' in that specification. |
Standard | |
ECMAScript 2017 Draft (ECMA-262) The definition of 'Math.acos' in that specification. |
Draft |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
See also
Etiquetas y colaboradores del documento
Etiquetas:
Colaboradores en esta página:
eduardoboucas,
fscholz,
Mingun,
schlagi123,
fred.wang,
Sheppy,
ethertank,
evilpie,
Mgjbot,
Kyodev,
Maian,
Marcoos,
Dria
Última actualización por:
eduardoboucas,