JavaScript acosh

Returns the inverse hyperbolic cosine of the number, i.e. the value whose hyperbolic cosine is number

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function acosh (arg) {
    // Returns the inverse hyperbolic cosine of the number, i.e. the value whose hyperbolic cosine is number  
    // 
    // version: 1109.2015
    // discuss at: http://phpjs.org/functions/acosh    // +   original by: Onno Marsman
    // *     example 1: acosh(8723321.4);
    // *     returns 1: 16.674657798418625
    return Math.log(arg + Math.sqrt(arg * arg - 1));
}

Examples

Running

1

acosh(8723321.4);

Should return

1

16.674657798418625

Dependencies

No dependencies, you can use this function standalone.

Open syntax issues

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Eventually we want all code to pass or at least take into consideration most fixes suggested by JsLint, following this JsLint configuration we’ve decided on.

Authors

Thanks to the following developers, you get to have acosh goodness in JavaScript.

• Onno Marsman ( original )

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