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- 'use strict';
- var $ = require('../internals/export');
- var expm1 = require('../internals/math-expm1');
-
- // eslint-disable-next-line es/no-math-cosh -- required for testing
- var $cosh = Math.cosh;
- var abs = Math.abs;
- var E = Math.E;
-
- var FORCED = !$cosh || $cosh(710) === Infinity;
-
- // `Math.cosh` method
- // https://tc39.es/ecma262/#sec-math.cosh
- $({ target: 'Math', stat: true, forced: FORCED }, {
- cosh: function cosh(x) {
- var t = expm1(abs(x) - 1) + 1;
- return (t + 1 / (t * E * E)) * (E / 2);
- }
- });
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