Nu-Coder Manual

PhpExpress Manual

PHP Joomla
Development

atan2	base_convert

Math Functions	Last updated: Mon, 26 Oct 2026

atanh

(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

atanh — Inverse hyperbolic tangent

Description

function atanh(float $num): float

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

Parameters

num: The argument to process

Return Values

Inverse hyperbolic tangent of num

See Also

tanh() - Hyperbolic tangent
atan() - Arc tangent
asinh() - Inverse hyperbolic sine
acosh() - Inverse hyperbolic cosine

atan2	base_convert

Math Functions	Last updated: Mon, 26 Oct 2026