cosh

(PHP 4 >= 4.1.0, PHP 5)

cosh — Hyperbolic cosine

Description

float cosh ( float $arg )

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

Parameters

arg: The argument to process

Return Values

The hyperbolic cosine of arg

See Also

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