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asin	atan

Math Functions	Last updated: Mon, 26 Oct 2026

asinh

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

asinh — Inverse hyperbolic sine

Description

function asinh(float $num): float

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

Parameters

num: The argument to process

Return Values

The inverse hyperbolic sine of num

See Also

sinh() - Hyperbolic sine
asin() - Arc sine
acosh() - Inverse hyperbolic cosine
atanh() - Inverse hyperbolic tangent

asin	atan

Math Functions	Last updated: Mon, 26 Oct 2026