PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8
atanh - Inverse hyperbolic tangent

atanh( float$num ): float

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



The argument to process

Return Values

Inverse hyperbolic tangent of num

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Function atanh:

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