Advertisement
Online Test Banks
Score higher
See Online Test Banks
eLearning
Learning anything is easy
Browse Online Courses
Mobile Apps
Learning on the go
Explore Mobile Apps
Dummies Store
Shop for books and more
Start Shopping

TI-84 Plus Keyboard Basics

The row of keys under the calculator screen on the TI-84 Plus keyboard contains the keys you use when graphing. The next three rows, for the most part, contain editing keys, menu keys, and arrow keys. The arrow keys

image0.png

control the movement of the cursor. The remaining rows contain, among other things, the keys you typically find on a scientific calculator.

Keys on the calculator are always pressed one at a time; they are never pressed simultaneously. An instruction such as [2nd][ON] indicates that you should first press [2nd] and then press [ON].

Access the TI-84 Plus functions in blue

Above and to the left of most keys is a secondary key function written in blue. To access that function, first press y and then press the key. For example,

image1.png

is in blue above the

image2.png

key, so to use

image3.png

in an expression, press [2nd] and then press that key.

Use the TI-84 Plus [ALPHA] key to write words

Above and to the right of most keys is a letter written in green. To access these letters, first press [ALPHA] and then press the key. For example, because the letter O is in green above the [7] key, to enter this letter, press [ALPHA] and then press [7].

You must press [ALPHA] before entering each letter. However, if you want to enter many letters, first press [2nd][ALPHA] to lock the calculator in Alpha mode. Then all you have to do is press the keys for the various letters. When you’re finished, press [ALPHA] to take the calculator out of Alpha mode.

For example, to enter the word TEST into the calculator, press [2nd][ALPHA][4][SIN][LN][4] and then press [ALPHA] to tell the calculator that you’re no longer entering letters.

Use the TI-84 Plus [ENTER] key

The [ENTER] key is used to evaluate expressions and to execute commands. After you have, for example, entered an arithmetic expression (such as 5 + 4), press [ENTER] to evaluate that expression. In this context, the [ENTER] key functions as the equal sign.

Use miscellaneous TI-84 Plus keys

image4.png

is the key you use to enter the variable in the definition of a function, a parametric equation, a polar equation, or a sequence. In Function mode, this key produces the variable X. In Parametric mode it produces the variable T; and in Polar and Sequence modes it produces the variables

image5.png

and n, respectively.

The arrow keys

image6.png

control the movement of the cursor. These keys are in a circular pattern in the upper-right corner of the keyboard. As expected,

image7.png

moves the cursor to the right,

image8.png

moves it to the left, and so on.

  • Add a Comment
  • Print
  • Share
blog comments powered by Disqus
Advertisement
Advertisement

Inside Dummies.com

Dummies.com Sweepstakes

Win an iPad Mini. Enter to win now!