(PHP 4, PHP 5)
atan — Arc tangent
Описание
float atan ( float $arg )Returns the arc tangent of arg in radians. atan() is the complementary function of tan(), which means that a==tan(atan(a)) for every value of a that is within atan()'s range.
Список параметров
- arg
-
The argument to process
Возвращаемые значения
The arc tangent of arg in radians.
Смотрите также
| tan() |
| atanh() |
| asin() |
| acos() |
