Texas Instruments BA II PLUS - Manual (Page 7)

Overview of Calculator Operations 3
The indicators along the top of the display tell you which keys are active
and offer information about the status of the calculator.
Indicator Meaning
2nd Press a key to select its second function.
INV Press a key to select its inverse trigonometric function.
HYP Press a key to select its hyperbolic function.
COMPUTE Press % to compute a value for the displayed variable.
ENTER Press ! to assign the displayed value to the displayed
variable.
SET Press & V to change the setting of the displayed
variable.
# $ Press " or # to display the previous or next variable in the
worksheet.
Note: To easily scroll up or down through a range of
variables, press and hold
# or ".
DEL Press & W to delete a cash flow or statistical data point.
INS Press & X to insert a cash flow or statistical data point.
BGN TVM calculations use beginning-of-period payments. When
BGN is not displayed, TVM calculations use end-of-period
payments (END).
RAD Angle values appear in radians. When RAD is not displayed,
angle values appear and must be entered in degrees.
 The displayed value is entered in the selected worksheet.
The indicator clears following a computation.
 The displayed value is computed in the selected worksheet.
When a value changes and invalidates a computed value,
the
_indicator clears.
= The displayed variable is assigned the displayed value.
– The displayed value is negative.