(PHP 4, PHP 5, PHP 7) Generate a random integer

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

(PHP 4, PHP 5, PHP 7) Arc sine float asin ( float

(PHP 4, PHP 5, PHP 7) Octal to decimal number

(PHP 4, PHP 5, PHP 7) Sine float sin ( float

(PHP 4, PHP 5, PHP 7) Round fractions up float

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

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

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

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