V. DRAW Menu

A. Tangent

In algebra and calculus, you will often need to find an equation of a tangent line to a curve at a particular point. The TI-83 will draw a tangent line and will give a good approximation of the equation of the tangent line.

Example: Find an equation of the tangent line to the function shown below at X=2.

Enter the
function.
Set a window.
Use ZDecimal.

Graph with
ZDecimal.

Access tangent.
Use DRAW 5.
Enter a value
of X.
Press ENTER.
Tangent will be drawn.

To delete the tangent line, enter 1.

A. Tangent
B. Draw Inverse
C. Circle