## TI 89 Calculus How-To Articles

**Asymptotes****Derivatives****Graphing and Tables**:**Integrals****Limits****Other Topics**

## TI 89 Calculus: Magnify Graphs With the TI-89 ZoomBox feature

The TI-89 guesses at what portion of the graph you want to see. Usually, you’ll have to tweak the viewing window to get a useful result. The TI-89 has several features to change the viewing window, including ZoomIn, Zoomout and ZoomStd — which displays the “standard” window from -10 to 10. ZoomBox allows you to box in a certain area of the graph and then zoom in on that portion.

**Sample problem:** Magnify the graph of the following function using ZoomBox feature:f(x) = 10 sin(x)

Step 1: **Press HOME.
**

Step 2: Press the DIAMOND key and then F1 to

**enter the y=editor.**

Step 3: **Type the function into the in the “y1 =” slot of the y=editor. **To enter the function, press ENTER to move down to the input line and then press 10 2ND Y x ).

Step 4: **Press ENTER.**

Step 5: Press the DIAMOND key and then F3 to **view the graph of the function. **If you can’t see the graph on your screen, set your window to display the graph. For this particular graph, you’ll be able to see the graph with the ZoomStd feature; Press F2 and then press 6.

Step 6: Press F2 and then 1 to **access the ZoomBox feature.**

Step 7: **Select the first corner of the box** by pressing the arrow keys. Press ENTER.

Step 8: **Select the second corner of the box.** Press ENTER.

*That’s it! You’re done! *

## References

**CITE THIS AS:**

**Stephanie Glen**. "TI 89 Calculus: Step by Step" From

**CalculusHowTo.com**: Calculus for the rest of us! https://www.calculushowto.com/ti-89-calculus/

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