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Last change
on this file since b738035 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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initial commit
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| 1 | var $ = require('../internals/export');
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| 2 | var expm1 = require('../internals/math-expm1');
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| 3 |
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| 4 | var exp = Math.exp;
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| 5 |
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| 6 | // `Math.tanh` method
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| 7 | // https://tc39.es/ecma262/#sec-math.tanh
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| 8 | $({ target: 'Math', stat: true }, {
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| 9 | tanh: function tanh(x) {
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| 10 | var a = expm1(x = +x);
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| 11 | var b = expm1(-x);
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| 12 | return a == Infinity ? 1 : b == Infinity ? -1 : (a - b) / (exp(x) + exp(-x));
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| 13 | }
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| 14 | });
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