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- // 20.2.2.33 Math.tanh(x)
- var $export = require('./_export');
- var expm1 = require('./_math-expm1');
- var exp = Math.exp;
- $export($export.S, 'Math', {
- tanh: function tanh(x) {
- var a = expm1(x = +x);
- var b = expm1(-x);
- return a == Infinity ? 1 : b == Infinity ? -1 : (a - b) / (exp(x) + exp(-x));
- }
- });
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