(PHP 4, PHP 5, PHP 7) Hexadecimal to decimal

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Hyperbolic cosine

(PHP 4, PHP 5, PHP 7) Seed the better random number generator

(PHP 4, PHP 5, PHP 7) Converts the number in degrees to the radian equivalent

(PHP 4, PHP 5, PHP 7) Find lowest value mixed

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Inverse hyperbolic tangent

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Calculate the length of the hypotenuse of a right-angle triangle

(PHP 4, PHP 5, PHP 7) Generate a better random value

(PHP 4, PHP 5, PHP 7) Calculates the exponent of e

(PHP 4, PHP 5, PHP 7) Tangent float tan ( float