PHP 忒聊 綴豖 ヶ輛 tanh (PHP 4 = 4.1.0) Description Returns the hyperbolic tangent of arg, defined as sinh(arg)/cosh(arg). See also tan(), atanh(), sin() and cos(). 綴豖 れ萸 ヶ輛 tan 奻珨撰 Multi-Byte String Functions