Drawing Tangent Lines - Texas Instruments TI-83 Manual Book

Drawing Tangent Lines

Drawing
a Tangent Line
Directly
on a Graph
Drawing
a Tangent Line
from the Home
Screen or
a Program
8-8 Instructions
DRAW
To draw a tangent line when a graph is displayed, follow
these steps.
1. Select
5:Tangent(
2. Press † and } to move the cursor to the function for
which you want to draw the tangent line. The current
graph's function is displayed in the top-left corner, if
Y=
is selected.
ExprOn
3. Press ~ and | or enter a number to select the point on
the function at which you want to draw the tangent line.
4. Press Í. In
tangent line was drawn is displayed on the bottom of
the screen, along with the equation of the tangent line.
In all other modes, the
Tip: Change the fixed decimal setting on the mode screen if you want
to see fewer digits displayed for
(tangent line) draws a line tangent to expression
Tangent(
in terms of , such as
X
an expression. expression is interpreted as being in
mode.
expression
Tangent(
from the
DRAW
mode, the
Func X
value is displayed.
dy/dx
X
and the equation for
2
or , at point
Y X
1
value
, )
menu.
value at which the
Y
.
=value. can be
X X
Func