Casio CFX-9970G User Manual page 179

10 - 2
Graphing with the Sketch Function
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>, <
P.30 • Use the variable data (VARS) menu to specify the function to be graphed.
Example
1. In the RUN Mode, display the sketch menu, press 2 (Tang), and then
2. Press w to draw the tangent line.
k k k k 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
u u u u u To draw a line normal to a curve in the GRAPH or TABLE Mode
Example
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
To draw a line that is tangent to point (
x
( – 2)
perform the following input.
J4(GRPH)1(Y)b,c
the tangent line at that point.
To draw a line that is normal to the curve at point (
y x x
= ( + 2)(
want to draw the line.
x
-coordinate>
x
– 2)
x y y x x
= 2, = 0) of = (
[Sketch]-[Norm]
x y
= 2, = 0) of
+ 2)
156