Texas Instruments TI-83 Getting Started: Drawing a Tangent Line

8-2 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 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