You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
12 lines
318 B
JavaScript
12 lines
318 B
JavaScript
// 20.2.2.33 Math.tanh(x)
|
|
var $export = require('./_export')
|
|
, expm1 = require('./_math-expm1')
|
|
, exp = Math.exp;
|
|
|
|
$export($export.S, 'Math', {
|
|
tanh: function tanh(x){
|
|
var a = expm1(x = +x)
|
|
, b = expm1(-x);
|
|
return a == Infinity ? 1 : b == Infinity ? -1 : (a - b) / (exp(x) + exp(-x));
|
|
}
|
|
}); |