Casio fx-9750G PLUS - Manual (Page 184)

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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.
J4 (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