Casio CFX-9850G PLUS, User'S Manual & Technical Reference

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156
u u
u u
u
To 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. In the RUN Mode, display the sketch menu, press
2
(Tang), and then
perform the following input.
J 4
(GRPH)
1
(Y)
b,c
2. Press
w
to draw the tangent line.
k k k k 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.
u u u u u
To 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