180
11.1.10 Return Formula
There may be times, after viewing a result, that you wish to be reminded what
expression you used to obtain that result. The "return formula" function allows you
to return the expression you just entered
When your result is displayed, press "Enter-R", or select "Return Formula" from
the menu.
The expression you entered to obtain your current result is displayed.
11.1.11 Option Settings
You can activate the "Option Settings" by pressing "Enter" on the menu option, or
from your calculation line, press "Enter-O".
The "Option Settings" dialog contains a "setting list", a "Confirm" button, and a
"Cancel" button. The "setting list" consists of "Angle Unit" and "Calculator Braille
Code". You can navigate among the 2 options by pressing "Space-1" or "Space-
4". Use "Space" to change the value of each setting.
When setting the angle unit, if you select "Radian", you can get the PI value while
using the trigonometric function. If you select "Degree" and activate PI, you will
get a wrong answer as this is not a valid calculation.
You can set the Calculator Braille code to computer Braille, Nemeth or UEB math
Braille as described previously. You can use "Space-G" to change this setting
from anywhere in the calculator.
