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HP -28S Manual Page 91

Advanced scientific calculator.
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Purge any existing PPAR.
~ PPflR
.1
PURGE
1
Select Radians angle mode and STD number display mode .
• 1 MODE 1
-
STO
If~
I
IiiDIilIIIEDlKaDBImIltI
Now enter the expression.
~
I
TRIG
1
SIN
X
1
ENTER
1
3:
2:
1:
'SIN(X)'
I!mIImmaa~1IllCII1lI1lCI
Store the expression as the
current equation-a
normal variable with
the special name EQ. (This is the same convention you followed with
the Solver in chapter 4.)
.1
PLOT
1
STEQ
Pressing
STEQ
is equivalent to pressing
~
EQ
1
STO
I.
Plot the expression.
DRAW
Wait for the «e") annunciator to disappear, indicating that the plot is
complete.
The horizontal line is the axis for the independent variable
(x
in this
example), and the vertical line is the axis for the dependent variable
(the value of the expression sin x). The ticks on both axes mark inter-
vals of length 1.
90
7: Plotting

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