Math.tanh()
A função Math.tanh()
retorna a tangente hiperbólica de um número, que é:
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Syntax
Math.tanh(x)
Parameters
x
- Um número.
Return value
Uma tangente hiperbólica de um número dado.
Description
Because tanh()
is a static method of Math
, you always use it as Math.tanh()
, rather than as a method of a Math
object you created (Math
is not a constructor).
Examples
Using Math.tanh()
Math.tanh(0); // 0
Math.tanh(Infinity); // 1
Math.tanh(1); // 0.7615941559557649
Polyfill
This can be emulated with the help of the Math.exp()
function:
Math.tanh = Math.tanh || function(x){
var a = Math.exp(+x), b = Math.exp(-x);
return a == Infinity ? 1 : b == Infinity ? -1 : (a - b) / (a + b);
}
Specifications
Specification | Status | Comment |
---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Math.tanh' in that specification. |
Padrão | Initial definition. |
ECMAScript (ECMA-262) The definition of 'Math.tanh' in that specification. |
Padrão em tempo real |
Browser compatibility
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