How can I compute x to the power of y?
It's ^ operator on the Second keyboard or double press × or *.
Where can I see square root (or n-th root) and trigonometric functions?
On the Second keyboard. Move the primary button panel to the left or press ... button (it depends on settings).
Why it does not return correct -1 result for expression cos(π)?
You should switch trigonometric units to Radians (use →RAD on Second keyboard).
Why expression time:23.00+2.00 gives 25.00 but not 1.00?
You should switch time calculation method to Diurnal time method in Settings.
How can I clear the memory?
It's MC (press and hold button C).
If you still have questions about the calculator please use the Feedback in Settings.