8–2 DRAW Instructions
82CA5D~1.DOC TI-83 international English Bob Fedorisko Revised: 10/26/05 1:27 PM Printed: 10/27/05 2:36
PM Page 2 of 20
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 = ‡2/2 for the function
Y = sinX.
Before you begin, select
Radian and Func mode
from the mode screen, if necessary.
1. Press o to display the
Y= editor. Press ˜
„ ¤ to store
sin(X) in Y1.
2. Press q 7 to select 7:ZTrig, which graphs
the equation in the Zoom Trig window.
3. Press y [DRAW] 5 to select 5:Tangent(. The
tangent instruction is initiated.
4. Press y [‡] 2 ¤ ¥ 2.
5. Press Í. The tangent line is drawn; the X
value and the tangent-line equation are
displayed on the graph.
Getting Started: Drawing a Tangent Line
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