Sharp EL-9900 Operation Manual page 116

Chapter 6: Advanced Graphing Features — Advanced Keyboard
From the GRAPH
5 T_line(
From the Calculation
From the GRAPH
106
V_Line
window
Example
• Draw a vertical line manually.
1. Press @ d A 4.
2. Use the cursor navigation keys ({ } ;
') to move the flashing cursor to the appropri-
ate position.
3. Press E to draw the line.
Draws a tangental line at the specified point of a graph
curve.
T_line( equation, x-value )
screen
Example
• Draw the tangental line of y = x
1. Select T_Line(.
2. Enter "x
the line.
3. Press E.
Note: It is also possible to
specify a function
equation from Y0 to
Y9 if stored.
(T_line(Y1, 1))
T_line(
window
Example
• Draw a tangental line by manually specifying the
point.
1. Select T_Line(.
2. Use ; ' to move the flashing cursor on
the targeted graph line.
Use { } to select a graph to draw the
tangental line.
3. When the point is set at the tangent point, press
E.
2
, 1)" on
2 at x = 1.