Texas Instruments TI-84 PLUS - Graphing Calculator User Manual

Chapter 8: Draw Instructions 121
Chapter 8:
Draw Instructions
Getting Started: Drawing a Tangent Line
Getting Started is a fast-paced introduction. Read the chapter for details.
Suppose you want to find the equation of the tangent line at X = for the function Y=sin(X).
1. Before you begin, press z and select
4, Radian
and
Func, if necessary.
2. Press o to display the Y= editor. Press
˜ „ ¤ to store
sin(X) in Y1.
3. Press q
7 to select 7:ZTrig, which graphs the
equation in the
Zoom Trig window.
4. Press y <
5 to select 5:Tangent(. The
tangent instruction is initiated.
5. Press y C
2 ¤ ¥ 2.
2
2
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Texas Instruments TI-84 PLUS - Graphing Calculator Specifications

General

Type	Graphing Calculator
Display Type	LCD
Screen Resolution	96 x 64 pixels
Processor	Zilog Z80
Memory	24 KB RAM, 480 KB Flash ROM
Power Source	4 AAA batteries (with backup lithium battery)
Connectivity	I/O port
Weight	7.4 oz (210 g)
Software	TI-OS (Texas Instruments Operating System)