To enter the function, press ENTER to move down to the input line and then press 10 2ND Y x ).TEXAS INSTRUMENTS APP SOFTWARE LICENSE AGREEMENTīy downloading the software and/or documentation you agree to abide by the following provisions. Step 3: Type the function into the in the “y1 =” slot of the y=editor. Step 2: Press the DIAMOND key and then F1 to enter the y=editor. Sample problem: Magnify the graph of the following function using ZoomBox feature:f(x) = 10 sin(x) ZoomBox allows you to box in a certain area of the graph and then zoom in on that portion. 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. Usually, you’ll have to tweak the viewing window to get a useful result. The TI-89 guesses at what portion of the graph you want to see. TI 89 for Calculus: Magnify Graphs With the TI-89 ZoomBox feature How to Find Roots/Zeros of a Function on the TI-89.

Piecewise Functions TI 89 “when(” Command.

Create a Table of Function Values on the TI-89.

Magnify Graphs With the TI-89 ZoomBox feature.

This makes sure the TI-89 doesn’t interpret xy as a new variable name.

Use implied multiplication on the home screen (e.g., x*y instead of xy).Variable names must start with a letter (for example, L1 for “list one”) and they can be up to 8 characters long.For example, you can find a factorial (!) here, which isn’t found in any of the functions or menus. If you can’t find what you’re looking for in the myriad of menus and sub-menus, check the catalog. The CATALOG key brings up a list of all available commands and functions.This comes in handy if you’re working on problem sets and want to briefly work some problems. F6 2:New Problem will ease all variables named by a single letter.You can also use the ESC key if you enter data but decide not to save it. If you enter an application and decide not to go further (or if you hit the wrong key), the ESC button will back out of the menu. These will get you out of many sticky situations if you get lost in a nest of applications screens, the home button will return you to the home screen. The home key (orange) and escape keys (blue).Perhaps the two most important buttons are the HOME keys and ESC keys.

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