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14 lines
384 B
14 lines
384 B
var $ = require('../internals/export'); |
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var expm1 = require('../internals/math-expm1'); |
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var exp = Math.exp; |
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// `Math.tanh` method |
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// https://tc39.github.io/ecma262/#sec-math.tanh |
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$({ target: 'Math', stat: true }, { |
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tanh: function tanh(x) { |
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var a = expm1(x = +x); |
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var b = expm1(-x); |
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return a == Infinity ? 1 : b == Infinity ? -1 : (a - b) / (exp(x) + exp(-x)); |
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} |
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});
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