Texas Instruments TI-84 - Manual (Page 196)

Chapter 8: Draw Instructions 193
Note: Change the fixed decimal setting on the mode screen if you want to see fewer
digits displayed for X and the equation for Y.
Drawing a Tangent Line from the Home Screen or a Program Drawing a Tangent Line from the Home Screen or a Program Drawing a Tangent Line from the Home Screen or a Program Drawing a Tangent Line from the Home Screen or a Program
Tangent( (tangent line) draws a line tangent to expression in terms of X, such as Y1 or X
2
,
at point X=value . X can be an expression. expression is interpreted as being in Func mode.
Tangent(expression,value)