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Getting Started
with the
TI-73 Explorer™,
CBL 2™, and CBR™
CL3456
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Contents Important Information ........................................................................ 2 Contents ............................................................................................ 3 TI-73 Explorer™ keys ....................................................................... 4 Turning on and turning off the TI-73 Explorer™ ............................... 5 Home screen ..................................................................................... 6 Entering text
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TI-73 Explorer™ keys $ " # ! - Let you move the Accesses the cursor in four secondary directions on the functions of keys screen. (shown in yellow above keys). : Erases entries and answers on the Home screen and entry line. 9 Lists the applications installed on your TI-73 Explorer. b ^ Evaluates an Turns on the TI-73 expression, executes Explorer. an instruction, and selects a menu item. 4 © 2003 Texas Instruments Incorporated.
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Turning on and turning off the TI-73 Explorer™ • To turn on the TI-73 Explorer, press ^ located at the lower left corner of the device. To turn off the TI-73 Explorer, press -, and then the ^ key. The next time you turn on the TI-73 Explorer, the Home screen appears with the same settings and memory contents retained. Automatic Power Down™ The Automatic Power Down™ (APD™) feature prolongs battery life by turning off the TI-73 Explorer automatically after five inactive minutes. When you t
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Home screen The first time you turn on your TI-73 Explorer™, this screen appears: Operating system version Note: Download the latest operating system (OS) to your Internet- enabled computer using the TI-Connectivity Kit. Both the latest OS and TI Connectivity Kit are available at education.ti.com/shop. To clear the screen, press : twice. A blank screen with a flashing cursor appears called the Home screen. You can use the Home screen to enter problems and view results. Home screen Note: If
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Example: Multiply 5 x 4. Press Result 5 M 4 b Entering secondary functions - Secondary functions are printed in yellow above the keys. To select a secondary function, first press the yellow - key, and then press a key with a secondary function. For example, to view the CATALOG menu, press - |. Note: The flashing cursor (Ù) changes to Û when you press the - key. © 2003 Texas Instruments Incorporated. 7
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Entering text -t You can use the Text Editor to key in text, such as alphabetic characters, braces, quotation marks, spaces, and relations. To access the Text Editor, press - t. To return to the Home screen from the Text Editor: Select Done in the Text Editor and press b. — or — To cancel the operation, press - l. Example: Insert R on the Home screen. Press Result - t R b Note: To select R, press !, ", # and $ as needed. R is pasted to the entry line. # # # (to select Done) b 8 © 200
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Clear : and Quit - l Clear : The : key is located just below the four cursor keys at the upper right corner of the keyboard. Pressing : while entering information clears the entry line. Pressing : when the cursor is on a blank line clears the Home screen. Note: Although it does not affect calculations, consider clearing the Home screen before beginning a new problem. We recommend that you press : each time you begin a new example in this guide to ensure that the screen you see match
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Using subtraction T and negation a keys Use T to enter subtraction operations. Use a to enter a negative number in an operation, expression, or on a setup screen. Note: The TI-73 Explorer™ subtraction and negation symbols appear slightly different to make them easier to distinguish. The negative symbol is raised and slightly shorter. Example: Subtract 10 from 25. Press Result b/c mode. 2 5 T 1 0 b b/c mode. Example: Subtract L10 from 25. Press Result 2 5 T a 1 0 b Example: Subtract L5 fro
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Keyboard math applications Example: Add L456 + 123. Press Result a 4 5 6 \ 1 2 3 b Example: Divide 45.68 P 123. Press Result 4 5 ` 6 8 F 1 2 3 b Example: Multiply 28 Q 1.5. Press Result 2 8 M 1 . 5 b © 2003 Texas Instruments Incorporated. 11
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Integer division - Œ - Œ divides two positive integers and displays the quotient and remainder (r). Example: Calculate 11 P 2 using integer division. Press Result 1 1 - Œ 2 b Note: The answer is 5 with a remainder of 1. Percent C Example: Convert 75% to a decimal. Press Result 7 5 C b 12 © 2003 Texas Instruments Incorporated.
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Square 6 2 Example: Calculate 5 . Press Result 5 6 b 2 2 Example: Compare the results of L5 and (L5) . Press Result a 5 6 b D a 5 E 6 b © 2003 Texas Instruments Incorporated. 13
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Square root -z Example: Calculate 256 . Press Result - z 2 5 6 E b Pi - „ The TI-73 Explorer™ displays p = 3.141592654 but uses 3.1415926535898 in calculations. Example: Multiply 4 Q p. Press Result 4 M - „ b 14 © 2003 Texas Instruments Incorporated.
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Fractions This example shows the stacked fraction and manual simplification features of the TI-73 Explorer™. (See Chapter 3 of the TI-73 Explorer Software Graphing Calculator Guidebook.) Example: Add 1 3/4 + 2 4/8 and manually simplify the result. Press Result . # # # # " b - l (to select Mansimp) 1 < 3 = 4 " \ 2 < 4 = 8 b Note: The arrow on the screen indicates that the answer can be simplified. ? b (optional step to convert mixed fraction to simple fraction) B b (to simplify the resu
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Choosing the simplification factor Example: Add 4/16 + 8/16 and choose the simplification factor to reduce the sum to lowest terms. Press Result - l : 4 = 1 6 " \ 8 = 1 6 b B 2 b B 3 b Because the result did not change, try another factor. B 2 b Simplification is complete. 16 © 2003 Texas Instruments Incorporated.
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Constants with counter-creating number patterns The TI-73 Explorer™ Constant feature makes it easy to create number patterns. Watch the pattern in the example below take shape on the Home screen. Example: Set up a SINGLE counter, define a constant (+5), and create a number pattern. Press Result y † } (if necessary) b † \ 5 - l : 0 @ (Press @ repeatedly until you reach 30.) © 2003 Texas Instruments Incorporated. 17
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Scrolling on the Home screen The TI-73 Explorer™ scrolling feature helps make number investigation easy by providing a copy and paste functionality. Example: Sum the second (5 + 5) and fifth (20 + 5) terms of the number pattern created in the previous example. (See “Constants with counter- creating number patterns” on page 17.) Press Result Press } repeatedly to select the second term (n=2). b \ Press } repeatedly to select the fifth term (n=5). b b 18 © 2003 Texas Instruments Incor
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Using parentheses D E Example: Multiply 4 * 1 + 2 and 4 * (1 + 2). Press Result 4 M 1 \ 2 b 4 M D 1 \ 2 E b Example: Divide 1/2 P 2/3 (not using stacked fraction capability). Press Result D 1 F 2 E F D 2 F 3 E b 1 Example: Calculate 16 ^ -- - . 2 Press Result 1 6 7 D 1 F2 E b Note: Try each of the examples above without the parentheses and see what happens! © 2003 Texas Instruments Incorporated. 19
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TI-73 Explorer™ menus You use a menu to enter most TI-73 Explorer functions and instructions on the Home screen. To select an item from a displayed menu: Press the number or letter displayed to the left of the item. — or — Use the cursor keys († or }) to select the item, and then press Í. Some menus close automatically when you make a selection. If a menu remains open, press y5 to exit. Example: Find the gcd(12, 14) = 2. Press Result 2 — or — † Í 1 2 , 1 4 ¤ Í 20 © 2003 Texas Instrume
