HP HP-28S - Modes; General Modes

24
Modes
You can affect the results of many operations by selecting a mode.
Some modes, such as angle mode (Degrees or Radians), can be se-
lected
by pressing a menu key. The mode's menu label includes a
small
square when the mode is selected. For example, the menu label
for Radians angle mode appears as RAD. when that mode is
selected.
Most modes,
such as Beeper mode (on or off), can be selected by set-
ting or clearing a user flag, using the commands SF (set flag) and CF
(clear flag). For example, flag 51 controls Beeper mode, so you can
turn the beeper off by executing 51 SF.
This chapter describes how the modes affect calculator operation and
lists the associated menu labels and flags. Also shown are annunci-
ators that appear when a mode is selected. For each mode, the
selection listed first is the default selection, active following Memory
Lost.
General Modes
These modes affect computations and the beeper.
Angle Mode
This mode determines whether real numbers represent angular mea-
sure in degrees or in radians. This affects arguments to trigonometric
functions
and the results from inverse trigonometric functions.
24: Modes 205