acos [PHP Script]

Syntax

float acos(float $val)

(PHP 4, PHP 5)

$val	Value to compute the arc cosine for.
RETURNS	Computes the trigonometry function `arc cosine` for the degree in radians ($val).

This function computes the arc cosine for the argument $val which is the degree in radians.

// compute the arc cosine for 1.4 radians
echo 'acos(1.4) = ' . acos(1.4);