PHP 忒聊 綴豖 ヶ輛 cosh (PHP 4 = 4.1.0) Description Returns the hyperbolic cosine of arg, defined as (exp(arg) + exp(-arg))/2. See also cos(), acosh(), sin() and tan(). 綴豖 れ萸 ヶ輛 cos 奻珨撰 decbin