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uu
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uTo draw a tangent in the RUN or PRGM Mode
The following is the command syntax for drawing a tangent in these modes.
Tangent <graph function>, <x-coordinate>
•Use the variable data (VARS) menu to specify the function to be graphed.
ExampleTo draw a line that is tangent to point (x = 2, y = 0) of y = x(x + 2)
(x – 2)
1. In the RUN Mode, display the sketch menu, press 2 (Tang), and then
perform the following input.
J4(GRPH)1(Y)b,c
2. Press w to draw the tangent line.
kk
kk
k Line Normal to a Curve [Sketch]-[Norm]
With this function you can draw a line that is normal to the curve at a specific
point.
•A line that is normal to the curve at a given point is one that is perpendicular to
the tangent line at that point.
uu
uu
uTo draw a line normal to a curve in the GRAPH or TABLE Mode
Example To draw a line that is normal to the curve at point (x = 2, y = 0) of
y = x(x + 2)(x – 2)
1. After graphing the function, display the sketch menu and press 3 (Norm).
2. Use the cursor keys to move the pointer the position of the point where you
want to draw the line.
10 - 2 Graphing with the Sketch Function
P.30
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