(PHP 4, PHP 5, PHP 7) Get value of pi float pi

(PHP 4, PHP 5, PHP 7) Decimal to octal string

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Returns exp(number) - 1, computed in a way that is accurate even when the

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

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Finds whether a value is infinite

(PHP 4, PHP 5, PHP 7) Show largest possible random value

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

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

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