2016-10-10 03:43:44 +02:00
|
|
|
// 20.2.2.3 Math.acosh(x)
|
2017-08-14 05:01:11 +02:00
|
|
|
var $export = require('./_export');
|
|
|
|
var log1p = require('./_math-log1p');
|
|
|
|
var sqrt = Math.sqrt;
|
|
|
|
var $acosh = Math.acosh;
|
2016-10-10 03:43:44 +02:00
|
|
|
|
2017-05-27 17:36:13 +02:00
|
|
|
$export($export.S + $export.F * !($acosh
|
|
|
|
// V8 bug: https://code.google.com/p/v8/issues/detail?id=3509
|
|
|
|
&& Math.floor($acosh(Number.MAX_VALUE)) == 710
|
2017-08-14 05:01:11 +02:00
|
|
|
// Tor Browser bug: Math.acosh(Infinity) -> NaN
|
2017-05-27 17:36:13 +02:00
|
|
|
&& $acosh(Infinity) == Infinity
|
|
|
|
), 'Math', {
|
2017-08-14 05:01:11 +02:00
|
|
|
acosh: function acosh(x) {
|
2016-10-10 03:43:44 +02:00
|
|
|
return (x = +x) < 1 ? NaN : x > 94906265.62425156
|
|
|
|
? Math.log(x) + Math.LN2
|
|
|
|
: log1p(x - 1 + sqrt(x - 1) * sqrt(x + 1));
|
|
|
|
}
|
2017-08-14 05:01:11 +02:00
|
|
|
});
|