The cursor is now in the
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).
8\@@@OK@@@8@@@OK@@@, and the V-VIEW range to -6 to 2 by using
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.
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 (
Greek for heart).
Press @EDIT L @LABEL @MENU to see the graph with labels. Press L to
recover the menu. Press L @) P ICT to recover the original graphics menu.
Press @TRACE @x,y@ to trace the curve.
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.
example, when you press „ñ after finishing the previous exercise, you
field. Press ³~‚t @@@OK@@@ to
value to 0, and the High value to 6.28 (≈ 2π), by
The data shown at the bottom of