By brolloh Another simple but widely unused and unknown trick for the iOS mathematicians! This one has existed since the days of ‘iPhone OS 1′ and really shows the innovative way Apple used the accelerometer from the start.
Fire up your iOS Calculator app, what more could you want? Well, if you’re trying to work out how many cakes to buy for a party of 15 children, nothing more. If you’re trying to work out |2(sqrt{2[log4(16)]} – {[log3(27)]3})| + 2 then perhaps you need a lot more. We know the answer is 16 thanks to this tip.

Tilt your iPhone 90º and there you go, the most scientific of calculators is at your disposal!
More soon!

Source: SquareCMD