Math.cos()
The Math.cos()
static function
returns the cosine of the specified angle, which must be
specified in radians.
Syntax
Math.cos(x)
Parameters
x
-
The angle in radians for which to return the cosine.
Return value
The cosine of the given number.
Description
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).
Examples
Using Math.cos()
Math.cos(0); // 1
Math.cos(1); // 0.5403023058681398
Math.cos(Math.PI); // -1
Math.cos(2 * Math.PI); // 1
Specifications
Specification |
---|
ECMAScript Language Specification # sec-math.cos |
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