atan

(PHP 4, PHP 5, PHP 7)

atan — Arc tangent

Descrierea

atan ( float $arg ) : float

Returns the arc tangent of arg in radians. atan() is the inverse function of tan(), which means that a==tan(atan(a)) for every value of a that is within atan()'s range.

Parametri

arg

The argument to process

Valorile întoarse

The arc tangent of arg in radians.

A se vedea și