The Math.cos() static function returns the cosine of the specified angle, which must be specified in radians.
The Math.cos() static function returns the cosine of the specified angle, which must be specified in radians.
Math.cos(x)
xThe angle in radians for which to return the cosine.
The cosine of the given number.
The Math.cos() method returns a numeric value between -1 and 1, which represents the cosine of the angle.
Because cos() is a static method of Math, you always use it as Math.cos(), rather than as a method of a Math object you created (Math is not a constructor).
Math.cos(0); // 1 Math.cos(1); // 0.5403023058681398 Math.cos(Math.PI); // -1 Math.cos(2 * Math.PI); // 1
| Specification |
|---|
| ECMAScript Language Specification # sec-math.cos |
| Desktop | Mobile | Server | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
cos |
1 |
12 |
1 |
3 |
3 |
1 |
4.4 |
18 |
4 |
10.1 |
1 |
1.0 |
1.0 |
0.10.0 |
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/cos