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4 years ago
var $ = require('../internals/export');
var expm1 = require('../internals/math-expm1');
var nativeCosh = Math.cosh;
var abs = Math.abs;
var E = Math.E;
// `Math.cosh` method
// https://tc39.github.io/ecma262/#sec-math.cosh
$({ target: 'Math', stat: true, forced: !nativeCosh || nativeCosh(710) === Infinity }, {
cosh: function cosh(x) {
var t = expm1(abs(x) - 1) + 1;
return (t + 1 / (t * E * E)) * (E / 2);
}
});