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PHP : Function Reference : Mathematical Functions : atanh

atanh

Inverse hyperbolic tangent (PHP 4 >= 4.0.7, PHP 5)
float atanh ( float arg )

Returns the inverse hyperbolic tangent of arg, i.e. the value whose hyperbolic tangent is arg.

Note:

This function is not implemented on Windows platforms.

Parameters

arg: The argument to process

Return Values

Inverse hyperbolic tangent of arg

See Also

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