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Modes; General Modes - HP -28S Manual

Advanced scientific calculator.
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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

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