JavaScript cos() method
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Definition and usage
cos()
The method returns the cosine value of a number.
Note:cos()
The method returns a number between -1 and 1, representing the cosine value of an angle.
Instance
Example 1
Returns the cosine of a number:
Math.cos(3);
Example 2
Returns the cosine of PI and 2*PI:
var a = Math.cos(Math.PI); var b = Math.cos(2 * Math.PI);
Syntax
Math.cos(x)
Parameter value
Parameter | Description |
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x | Required. Number. |
Technical details
Return value: | The value, ranging from -1 to 1, represents the cosine of an angle. If the value is empty, it returns NaN. |
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JavaScript Version: | ECMAScript 1 |
Browser Support
Method | Chrome | Edge | Firefox | Safari | Opera |
---|---|---|---|---|---|
cos() | Support | Support | Support | Support | Support |
Related Pages
Tutorial:JavaScript Math
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- Go to the Previous Level JavaScript Math Reference Manual