| 1 | ;
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| 2 | var $ = require('../internals/export');
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| 3 | var expm1 = require('../internals/math-expm1');
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| 4 |
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| 5 | // eslint-disable-next-line es/no-math-cosh -- required for testing
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| 6 | var $cosh = Math.cosh;
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| 7 | var abs = Math.abs;
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| 8 | var E = Math.E;
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| 9 |
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| 10 | var FORCED = !$cosh || $cosh(710) === Infinity;
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| 11 |
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| 12 | // `Math.cosh` method
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| 13 | // https://tc39.es/ecma262/#sec-math.cosh
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| 14 | $({ target: 'Math', stat: true, forced: FORCED }, {
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| 15 | cosh: function cosh(x) {
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| 16 | var t = expm1(abs(x) - 1) + 1;
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| 17 | return (t + 1 / (t * E * E)) * (E / 2);
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| 18 | }
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| 19 | });
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