Hp 49g+ User Manual download pdf (Page 397)

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• The cursor is now in the Indep field. Press ³~‚t @@@OK@@@ to

change the independent variable to θ.

• Press L@@@OK@@@ to return to normal calculator display.

• Press „ò, simultaneously if in RPN mode, to access the PLOT

window (in this case it will be called PLOT –POLAR window).

• Change the H-VIEW range to –8 to 8, by using

8\@@@OK@@@8@@@OK@@@, and the V-VIEW range to -6 to 2 by using

6\@@@OK@@@2@@@OK@@@.

Note: the H-VIEW and V-VIEW determine the scales of the display

window only, and their ranges are not related to the range of values

of the independent variable in this case.

• Change the Indep Low value to 0, and the High value to 6.28 (≈ 2π), by

using: 0@@@OK@@@ 6.28@@@OK@@@.

• Press @ERASE @DRAW to plot the function in polar coordinates. The result is a

curve shaped like a hearth. This curve is known as a cardiod (

cardios,

Greek for heart).

• Press @EDIT L @LABEL @MENU to see the graph with labels. Press L to

recover the menu. Press L @)PICT to recover the original graphics menu.

• Press @TRACE @x,y@ to trace the curve. The data shown at the bottom of

the display is the angle θ and the radius r, although the latter is labeled Y

(default name of dependent variable).

• Press L@CANCL to return to the PLOT WINDOW screen. Press L@@@OK@@@

to return to normal calculator display.

In this exercise we entered the equation to be plotted directly in the PLOT

SETUP window. We can also enter equations for plotting using the PLOT

window, i.e., simultaneously if in RPN mode, pressing „ñ. For

example, when you press „ñ after finishing the previous exercise, you

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Hp 49g+ User Manual Page 397

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