Texas Instruments TI-84 Plus - Page 188

Chapter 8: Draw Instructions 185
3. Press y< 5 to select 5:Tangent(. The
tangent instruction is initiated.
4. Press y C
2 ¤ ¥ 2.
5. Press Í. The tangent line is drawn; the X
value and the tangent-line equation are displayed
on the graph.