/**
* Returns the arc tangent of a number.
*
* @param float $number
* @param float $y optional
* @return float The arc tangent of a number in radians.
*/
public function atan($number)
{
if (func_num_args() == 2) {
// If the user has passed in two parameters, let's
// assume that they want to calculate Atan2.
return $this->executionEngine->atan2(func_get_arg(1), func_get_arg(2));
}
// If the number of arguments is not two, just calculate
// the atan as normal.
return (double) $this->executionEngine->atan($number);
}
