During final approach on an airliner, there isn't any specifically pitch. It depends on your weight , your CG location, and many others factors like your angle of attack. But i can just say that the best pitch in any situation is the one at which you're at VREF+5 or VREF+5+wind and following your approach path( G/S or VNAV). And i'd like to confirm that yeah it's right, at final you've to increase your pitch of 2 degrees just at 30ft. You learn it during your 747 rating. But that isn't the same for all plane (ex: In the 737 , you flare just at 20ft). And (one more thing) , a new regulation, stipulates that all airliners have to keep thrust powered till the touchdown (not really useful during wind shear condition). That's it folks, if you want to know more about how to fly an airplane, ''JUST BECOME A PILOT'' .