main.js (1251B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2018 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 'use strict'; 20 21 // MODULES // 22 23 var atanh = require( './../../../../base/special/atanh' ); 24 25 26 // MAIN // 27 28 /** 29 * Computes the inverse hyperbolic cotangent of a number. 30 * 31 * @param {number} x - input value 32 * @returns {number} inverse hyperbolic cotangent (in radians) 33 * 34 * @example 35 * var v = acoth( 2.0 ); 36 * // returns ~0.5493 37 * 38 * @example 39 * var v = acoth( 0.0 ); 40 * // returns NaN 41 * 42 * @example 43 * var v = acoth( 0.5 ); 44 * // returns NaN 45 * 46 * @example 47 * var v = acoth( 1.0 ); 48 * // returns Infinity 49 * 50 * @example 51 * var v = acoth( NaN ); 52 * // returns NaN 53 */ 54 function acoth( x ) { 55 return atanh( 1.0/x ); 56 } 57 58 59 // EXPORTS // 60 61 module.exports = acoth;