Standard Mode
To raise a number to a power, tap the number, then tap the
button, then tap the power, then tap =.
To get a number's root, tap the number, then tap the
button, then tap the root, e.g. 2 for square root, then tap =.
Tap the +/- button to invert the displayed number's sign.
The remaining buttons apply their function to the displayed number, e.g. tap cos to get the cosine of the displayed number.