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Texas Instruments TI-83 Guide Book

Texas Instruments TI-83
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8-8 DRAW Instructions
8308DRAW.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:29 PM Printed: 02/19/01 1:49
PM Page 8 of 20
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.
Tip:
Change the fixed decimal setting on the mode screen if you want
to see fewer digits displayed for
X
and the equation for
Y
.
Tangent( (tangent line) draws a line tangent to
expression
in terms of
X, such as Y
1
or X
2
, at point X=
value
.
X can be
an expression.
expression
is interpreted as being in
Func
mode.
Tangent(
expression
,
value
)
Drawing Tangent Lines
Drawing
a Tangent Line
Directly
on a Graph
Drawing
a Tangent Line
from the Home
Screen or
a Program

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Texas Instruments TI-83 Specifications

General IconGeneral
ProgrammingTI-BASIC
ProcessorZilog Z80, 6 MHz
Weight7.4 oz (210 g)
Display96x64 pixels, monochrome LCD
Power Source4 AAA batteries, 1 CR1616 or CR1620 for backup
Memory32 KB RAM
Connectivity2.5mm I/O port for linking with other TI calculators

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