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14 lines
484 B
14 lines
484 B
// 20.2.2.3 Math.acosh(x) |
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var $export = require('./$.export') |
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, log1p = require('./$.math-log1p') |
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, sqrt = Math.sqrt |
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, $acosh = Math.acosh; |
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|
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// V8 bug https://code.google.com/p/v8/issues/detail?id=3509 |
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$export($export.S + $export.F * !($acosh && Math.floor($acosh(Number.MAX_VALUE)) == 710), 'Math', { |
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acosh: function acosh(x){ |
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return (x = +x) < 1 ? NaN : x > 94906265.62425156 |
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? Math.log(x) + Math.LN2 |
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: log1p(x - 1 + sqrt(x - 1) * sqrt(x + 1)); |
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} |
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}); |