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