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{{alias}}( x )
Computes the hyperbolic arccosine of a number.
The domain of `x` is restricted to `[1,+infinity)`. If `x < 1`, the function
will return `NaN`.
Parameters
----------
x: number
Input value.
Returns
-------
out: number
Hyperbolic arccosine (in radians).
Examples
--------
> var v = {{alias}}( 1.0 )
0.0
> v = {{alias}}( 2.0 )
~1.317
> v = {{alias}}( NaN )
NaN
// The function overflows for large `x`:
> v = {{alias}}( 1.0e308 )
Infinity
See Also
--------
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