JavaScript cosh

Returns the hyperbolic cosine of the number, defined as (exp(number) + exp(-number))/2

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function cosh (arg) {
    // Returns the hyperbolic cosine of the number, defined as (exp(number) + exp(-number))/2  
    // 
    // version: 909.322
    // discuss at: http://phpjs.org/functions/cosh    // +   original by: Onno Marsman
    // *     example 1: cosh(-0.18127180117607017);
    // *     returns 1: 1.0164747716114113
    return (Math.exp(arg) + Math.exp(-arg))/2;
}

Examples

Running

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cosh(-0.18127180117607017);

Should return

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1.0164747716114113

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 cosh goodness in JavaScript.

• Onno Marsman ( original )

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