Operation Manual

Chapter 8: Draw Instructions 129

5. Press Í. In Func mode, the X value at which the tangent line was drawn is displayed on the

bottom of the screen, along with the equation of the tangent line. In all other modes, the dy/dx

value is displayed.

6. 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

Tan gent( (tangent line) draws a line tangent to expression in terms of X, such as Y1 or X

, at point

X=value. X can be an expression. expression is interpreted as being in Func mode.

Tan gent(expression,value [,color#, line style#] )

Drawing Functions and Inverses

Drawing a Function

DrawF (draw function) draws expression as a function in terms of X on the current graph. When you

select

6:DrawF from the DRAW menu, the TI-84 Plus C returns to the home screen or the program

editor.

DrawF is not interactive.