## Using BC Calculator

1. Use the on-screen buttons or the keyboard to enter a number.
2. Operate on the number:
   Tap any basic operator (+ − ÷ ×), or tap a green button to select more advanced operations. For even more operations, tap-and-hold on the blue text on the left side of the display area.
   Single parameter operations:
     Tap a single parameter operation to operate on the number and immediately display the result. Ex: To do "cos-1(0)" tap:
     `[0][Trig:][cos-1(x)]`
     The reuslt is immediately displayed.
   Two parameter operations:
     Tap a two parameter operation, enter the second number, and press [=] to see the result. Ex: To do "53" tap:
     `[5][Exp:][xy][3][=]`
   Financial operations:
     Percentage example: To do $5 plus 8% tax tap:
     `[5][+][8][Fin:][%][=]`

## Other features

- To copy a number to the clip board, or store it in memory, tap-and-hold on the number. To recall a number from memory, tap and hold on the right side of the number area and choose the memory spot to recall (A, B, C, D or E). Traditional calculator memory functions (M+, M-, etc.) are available by tapping `[Fin:]`.
- Quickly tap the displayed number to backspace. Quickly tap the left side of the number area to clear the display. Tap again to cancel the current operation (all clear).
- The results of trigonometric functions are always given in radians. Use the r→d function to quickly convert to degrees.