Texas Instruments -84 Plus, Manual Book

Page: 195 / 696

Chapter 8: Draw Instructions 192
Drawing Tangent Lines Drawing Tangent Lines Drawing Tangent Lines Drawing Tangent Lines
Drawing a Tangent Line Directly on a Graph Drawing a Tangent Line Directly on a Graph Drawing a Tangent Line Directly on a Graph Drawing a Tangent Line Directly on a Graph
To draw a tangent line when a graph is displayed, follow these steps.
1. Select
5:Tangent(
from the
DRAW
menu.
2. Press
†
and
}
to move the cursor to the function for which you want to draw the
tangent line. The current graph’s Y= function is displayed in the top-left corner, if
ExprOn
is selected.
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
Func
mode, the X value at which the 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
dy/dx
value is displayed.