Texas Instruments TI-86 - Manual (Page 119)

Chapter 6: Graph Tools
107
06TOOLS.DOC TI-86, Chap 6, US English Bob Fedorisko Revised: 02/13/01 2:23 PM Printed: 02/13/01 3:01 PM Page 107 of 22 06TOOLS.DOC TI-86, Chap 6, US English Bob Fedorisko Revised: 02/13/01 2:23 PM Printed: 02/13/01 3:01 PM Page 107 of 22
Drawing a Function, Tangent Line, or Inverse Function
For DrawF , TanLn , and DrInv , expression is in terms of x . When you select DrawF , TanLn , or DrInv
from the GRAPH DRAW menu, it is pasted to the home screen or program editor. Upon
execution, the drawing is returned. DrInv draws the inverse of expression by plotting its x
values on the y-axis and its y values on the x-axis. DrInv is available only in Func graphing mode.
DrawF expression TanLn( expression , x ) DrInv expression
DrawF x^3+.3x 2 +4x TanLn(y1,1.5) DrInv y1
Drawing Freehand Points, Lines, and Curves
ᕡ Select PEN from the GRAPH DRAW
menu.
6 / '
/ '
ᕢ Move the cursor to where you want to
begin drawing.
ᕣ Turn on the pen.
ᕤ Draw whatever you want.
ᕥ Turn off the pen.
" # ! $
b
" # ! $
b
To draw more points, lines, or curves, repeat steps 2 through 5. To cancel, press :.
For DrawF, TanLn, and
DrInv
, you can use as
expression any variable to
which a valid expression is
stored (including deselected
equation variables).
In the illustrations,
y1=x^3+.3x
2 N 4x is selected.
In the example, the function
y(x)=x^3+.3x
2 N 4x is selected.
Also, ZSTD was executed.
To draw a diagonal line or
curve, turn on the pen, press
b b , press ! $ (or
# " , and so on), and repeat.