acos

(PHP 4, PHP 5, PHP 7)

acosArc cosine

Description

acos ( float $arg ) : float

Returns the arc cosine of arg in radians. acos() is the inverse function of cos(), which means that a==cos(acos(a)) for every value of a that is within acos()' range.

Parameters

arg

The argument to process

Return Values

The arc cosine of arg in radians.

See Also

add a note add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top