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cos	decbin

Math Functions	Last updated: Mon, 26 Oct 2026

cosh

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

cosh — Hyperbolic cosine

Description

function cosh(float $num): float

Returns the hyperbolic cosine of num, defined as (exp($num) + exp(-$num))/2.

Parameters

num: The argument to process

Return Values

The hyperbolic cosine of num

See Also

cos() - Cosine
acosh() - Inverse hyperbolic cosine
sinh() - Hyperbolic sine
tanh() - Hyperbolic tangent

cos	decbin

Math Functions	Last updated: Mon, 26 Oct 2026