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base_convert atan

Last updated: Fri, 26 Jan 2007

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# atanh

(PHP 4 >= 4.1.0, PHP 5)

atanh -- Inverse hyperbolic tangent

## Description

float atanh ( float arg )

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

> Замечание: Для Windows-платформ эта функция не реализована.

See also: atan(), asinh(), and acosh().

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base_convert atan

Last updated: Fri, 26 Jan 2007
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