177
uu
uu
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.
Example To draw a line that is tangent to point (x = 2, y = 0) of y = x(x + 2)
(x – 2)
1. Enter the RUN Mode, display the sketch menu, and then perform the following
input.
!4(Sketch)2(Tang)
J4(GRPH)
1(Y)b,c
2. Press w to draw the tangent line.
w
kk
kk
k Line Normal to a Curve
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).
!4(Sketch)3(Norm)
Graphing with the Sketch Function 10 - 2
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