(PECL trader >= 0.2.0) Vector Trigonometric ATan

(PECL trader >= 0.2.2) Get unstable period

(PECL stats >= 1.0.0) Calculates any one parameter of the negative binomial distribution given values for

(PECL trader >= 0.2.0) Vector Arithmetic Subtraction

(PECL trader >= 0.2.2) Set unstable period

(PHP 4, PHP 5, PHP 7) Arc cosine float acos (

(PHP 4, PHP 5, PHP 7) Cosine float cos ( float

(PHP 4, PHP 5, PHP 7) Decimal to hexadecimal

(PECL stats >= 1.0.0) Not documented float

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Divide numbers and get quotient and remainder