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