Hp 50g Graphing Calculator Uživatelský manuál stáhnout pdf (Strana 405)

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Page 12-22

Θ To see labels: @EDIT L@)LABEL @MENU

Θ To recover the menu: LL@)PICT

Θ 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).

Θ To recover the menu and return to the PLOT environment, press L@CANCL.

Θ 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

+ v

⋅COS θ

⋅t, y(t) = y

+ v

⋅sin θ

⋅t – ½⋅g⋅t

. To plot equations like these,

Note: The

H-View and V-View ranges were selected to show the intersection

of the two curves. There is no general rule to select those ranges, except based

on what we know about the curves. For example, for the equations shown

above, we know that the circle will extend from -3+1 = -2 to 3+1 = 4 in x, and

from -3+2=-1 to 3+2=5 in y. In addition, the ellipse, which is 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.

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