(PECL stats >= 1.0.0) Generates random deviates from a gamma distribution

(PECL stats >= 1.0.0) Not documented float

(PECL trader >= 0.2.0) Vector Trigonometric Sin

(PECL stats >= 1.0.0) generate two seeds for the RGN random number generator

(PECL trader >= 0.2.0) Beta array trader_beta

(PECL trader >= 0.2.0) Plus Directional Movement

(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

(PECL stats >= 1.0.0) Returns the harmonic mean of an array of values

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