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Last change
on this file since e29cc2e was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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initial commit
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File size:
746 bytes
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| 1 | var $ = require('../internals/export');
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| 2 | var log1p = require('../internals/math-log1p');
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| 3 |
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| 4 | // eslint-disable-next-line es/no-math-acosh -- required for testing
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| 5 | var $acosh = Math.acosh;
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| 6 | var log = Math.log;
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| 7 | var sqrt = Math.sqrt;
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| 8 | var LN2 = Math.LN2;
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| 9 |
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| 10 | var FORCED = !$acosh
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| 11 | // V8 bug: https://code.google.com/p/v8/issues/detail?id=3509
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| 12 | || Math.floor($acosh(Number.MAX_VALUE)) != 710
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| 13 | // Tor Browser bug: Math.acosh(Infinity) -> NaN
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| 14 | || $acosh(Infinity) != Infinity;
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| 15 |
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| 16 | // `Math.acosh` method
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| 17 | // https://tc39.es/ecma262/#sec-math.acosh
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| 18 | $({ target: 'Math', stat: true, forced: FORCED }, {
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| 19 | acosh: function acosh(x) {
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| 20 | return (x = +x) < 1 ? NaN : x > 94906265.62425156
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| 21 | ? log(x) + LN2
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| 22 | : log1p(x - 1 + sqrt(x - 1) * sqrt(x + 1));
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| 23 | }
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| 24 | });
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