How to Clear App Cache on HTC One
Android applications save cache and data on your Android phone's memory. You can easily clear app cache, clear app data, and force stop apps on HTC ...
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At the first look, the default calculator of your Galaxy device, is a simple calculator with some general operations. If you want to turn it to a scientific calculator, you just need to rotate your device to left or right, while the application is open.
As you see, you are able to use more functions such as Log, Ln, Sin, Cos, Tan, X! and more...
** To enable Screen Rotation, drag down the notification bar and make sure "Screen Rotation" is active.