70
Chapter 4: Graphing Features
T_line(
equation, x-value)
Example
• Draw the tangental line of
y = x
2
at
x = 1
.
1. Select
T_Line(
.
2. Enter “x
2
, 1)” on the line.
3. Press
E
.
Note:
It is also possible to specify a
function if stored in Y0 to Y9.
(T_line(Y1, 1))
T_line(
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
.
V_Line
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.
5 T_line(
Draws a tangental line at the specified point of a graph
curve.
From the Calculation
screen
From the GRAPH
window
From the GRAPH
window
