PHP 忒聊 綴豖 ヶ輛 acosh (PHP 4 = 4.1.0) Description Returns the inverse hyperbolic cosine of arg, i.e. the value whose hyperbolic cosine is arg. 蛁: 蜆滲杅祥巠蚚衾 Windows す怢ㄐ See also acos(), asinh() and atanh(). 綴豖 れ萸 ヶ輛 acos 奻珨撰 asin