Unformatted text preview: Conic Graphing Page 14 6. Press S.
7. Change the window parameters as needed.
8. Press R to return to the previous screen.
Graphing
Mode Window
Parameter Description All modes Xmin Smallest x value to be
displayed in the viewing window Xmax Largest x value to be displayed
in the viewing window Xscl Spacing between the tick marks
on the xaxis Ymin Smallest y value to be displayed
in the viewing window Ymax Largest y value to be displayed
in the viewing window Yscl Spacing between the tick marks
on the yaxis Tmin Smallest T value (step) to
evaluate Parametric
mode TI83 Plus Conic Graphing Page 15 Graphing
Mode Description Tmax Largest T value to evaluate Tstep Step increment Tmin Smallest T value (angle) to
evaluate in radians/degrees Tmax Largest T value to evaluate in
radians/degrees Tstep Polar mode
(ellipse
equations and
circle
equations
1 and 2) Window
Parameter T increment in radians/degrees Conic Graphing allows you to graph a partial conic section. To
do this, you must modify Tmin, Tmax, or Tstep (in parametric
mode) or Tmin, Tmax, or Tstep (in polar mode, for the ellipse and
circle equations 1 and 2 only). TI83 Plus Conic Graphing Page 16 CONIC ZOOM The CONIC ZOOM settings screen allows you to adjust the viewing
window of the graph quickly. This screen is similar to the
calculator’s zoom settings screen. Zoom settings that do not
apply to conic sections are not displayed.
Zoom Conic is a new zoom setting that applies only to Conic Graphing. It changes the viewing window so that you can see the
important characteristics of the conic section, regardless of the
conic section’s position on the graph. The following table
describes how Conic Graphing changes the calculator default
variables, based on the zoom setting you choose.
Note • You can only access the CONIC ZOOM screen after you have
selected an equation to graph.
• You can only access the CONIC ZOOM screen if the mode is
set to MAN. TI83 Plus Conic Graphing Page 17 Zoom
Parameter Description Zoom Conic Changes the zoom parameters so that you can see the
important characteristics of the conic section in the
viewing window, regardless of conic section’s position on
the graph. Also, changes the viewing window so that
#X=#Y, which makes the graph of a circle look like a
circle. (Otherwise, it would look like an ellipse.) Zoom In Magnifies the graph around the cursor. Zoom Out Views more of the graph around the cursor. ZBox Draws a box to define the viewing window. ZSquare Changes the viewing window based on the current
window variables so that #X=#Y, which makes the graph
of a circle look like a circle. (Otherwise, it would look like
an ellipse.) The midpoint of the current graph (not the
intersection of the axes) becomes the midpoint of the
new graph. ZStandard TI83 Plus Conic Graphing Sets the standard window variables: Xmin = 110,
Xmax = 10, Ymin = 110, Ymax = 10. Page 18 To see how different zoom settings affect the graph:
1. Make sure that the conic mode is set correctly (to function,
parametric, or polar, depending on what the e...
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 Fall '13
 ........., Conic section, Conic Graphing

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