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cursor at the center of the screen, the window gets zoomed so that the x-axis
extends from –64.5 to 65.5.
ZSQR
Zooms the graph so that the plotting scale is maintained at 1:1 by adjusting the
x scale, keeping the y scale fixed, if the window is wider than taller. This forces
a proportional zooming.
ZTRIG
Zooms the graph so that the x scale incorporates a range from about –3π to
+3π, the preferred range for trigonometric functions.
The SYMBOLIC menu and graphs
The SYMBOLIC menu is activated by pressing the P key (fourth key from the
left in fourth row from the top of the keyboard). This menu provides a list of
menus related to the Computer Algebraic System or CAS, these are:
All but one of these menus are available directly in the keyboard by pressing
the appropriate keystroke combination as follows. The Chapter of the user
manual where the menus are described is also listed:
ALGEBRA.. ‚× (the 4 key) Ch. 5
ARITHMETIC.. „Þ (the 1 key) Ch. 5
CALCULUS.. „Ö (the 4 key) Ch. 13
Note: None of these functions are programmable. They are only useful in an
interactive way. Do not confuse the command @ZFACT in the ZOOM menu with
the function ZFACTOR, which is used for gas dynamic and chemistry
applications (see Chapter 3).