Math.cosh()
The Math.cosh()
function returns the hyperbolic cosine of
a number, that can be expressed using the constant e:
Syntax
Math.cosh(x)
Parameters
x
-
A number.
Return value
The hyperbolic cosine of the given number.
Description
Because cosh()
is a static method of Math
, you always use it
as Math.cosh()
, rather than as a method of a Math
object you
created (Math
is not a constructor).
Examples
Using Math.cosh()
Math.cosh(0); // 1
Math.cosh(1); // 1.5430806348152437
Math.cosh(-1); // 1.5430806348152437
Polyfill
This can be emulated with the help of the Math.exp()
function:
Math.cosh = Math.cosh || function(x) {
return (Math.exp(x) + Math.exp(-x)) / 2;
}
or using only one call to the Math.exp()
function:
Math.cosh = Math.cosh || function(x) {
var y = Math.exp(x);
return (y + 1 / y) / 2;
};
Specifications
Specification |
---|
ECMAScript Language Specification # sec-math.cosh |
Browser compatibility
BCD tables only load in the browser