"; $return_value1 = atan2(1.5, 2.5); echo "The value of atan2(1.5, 2.5) is : " . $return_value1 . "
"; $return_value2 = atan2(-1.5, -2.5); echo "The value of atan2(-1.5, -2.5) is : " . $return_value2 . "
"; ?>