Hewlett-Packard F2226A - 48GII Graphic Calculator User's Manual
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Brand: HP
Category: Calculator
Type: Operation & user’s manual
Model: HP 48gII , HP F2226A - 48GII Graphic Calculator
Pages: 864 (9.97 Mb)
Page 12-23
centered at the origin (0,0), will extend from -2 to 2 in x, and from -√3 to √3
in y.
Notice that for the circle and the ellipse the region corresponding to the left
and right extremes of the curves are not plotted. This is the case with all
circles or ellipses plotted using Conic as the TYPE.
• To see labels: @EDIT L@)LABEL @MENU
• To recover the menu: LL@)PICT
• To estimate the coordinates of the point of intersection, press the @(X,Y)@
menu key and move the cursor as close as possible to those points using
the arrow keys. The coordinates of the cursor are shown in the display.
For example, the left point of intersection is close to (-0.692, 1.67), while
the right intersection is near (1.89,0.5).
• To recover the menu and return to the PLOT environment, press L@CANCL.
• To return to normal calculator display, press L@@@OK@@@.
Parametric plots
Parametric plots in the plane are those plots whose coordinates are generated
through the system of equations x = x(t) and y = y(t), where t is known as the
parameter. An example of such graph is the trajectory of a projectile, x(t) =
x
0
+ v
0
⋅COS θ
0
⋅t, y(t) = y
0
+ v
0
⋅sin θ
0
⋅t – ½⋅g⋅t
2
. To plot equations like these,
which involve constant values x
0
, y
0
, v
0
, and θ
0
, we need to store the values of
those parameters in variables. To develop this example, create a sub-
directory called ‘PROJM’ for PROJectile Motion, and within that sub-directory
store the following variables: X0 = 0, Y0 = 10, V0 = 10 , θ0 = 30, and g =
9.806. Make sure that the calculator’s angle measure is set to DEG. Next,
define the functions (use „à):