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Solution 10425: Finding the Absolute Value or Argument of a Complex Number on the TI-86.

...to find the absolute value (argument) of an imaginary number. Example: Find the absolute value of 53-22i Solution: • Press [2nd][MODE] • Scroll down to PolarC and press [ENTER] • Press [2nd][MATH] • Press [F1] • Press [F5] • Input after abs (53, -22) and press [ENTER] The answer is 57.384667 ...
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Solution 13062: Solving a System of Equations on the TI-89 Family, TI-92 Plus, and Voyage™ 200 Using the Gauss-Jordan method.

...echelon form:• Press [HOME].• Press [2ND] [MATH] [4] [ALPHA] [J] [2].* Note: You can quickly access the command by pressing [CATALOG] and scrolling down to find it.• Press [ALPHA] [B] [ALPHA] [B] [,] [2] [,] [1] [)].• Press [STO►] [ALPHA] [B] [ALPHA] [B].• Press [ENTER].• Press [2ND] [MATH] [4] [...
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Solution 11831: Correcting an Address Error on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.

...or. Please, bear in mind that this will erase the memory of the calculator and restore all manufacturer's defaults. On the TI-89 family: 1) Hold down the following keys [2nd] [] (right and left arrow keys). 2) Press [ON]. 3) Release all the keys at the same time. 4) Adjust the contrast, if nec...
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Solution 12177: Using the ZoomBox, ZoomIn, and ZoomOut Tools to Explore a Graph on the TI-89 Family, the TI-92 Family, and the Voyage™ 200.

...unction y=2*sin(x).• Press the [F2]• Select 1:ZoomBox• Move the cursor to any corner on the box to define, and press [ENTER]. The cursor changes to a small square, and the screen prompts for 2nd Corner?• Move the cursor to the opposite corner of the zoom box. As the cursor moves, the box stretche...
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Solution 12176: Using the Numeric Solver on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.

...d off. If the Apps Desktop is on, press [APPS] and select Numeric Solver. 2) At eqn: press [3] [0] [=] [5] [X] [ENTER].3) Move the cursor to the unknown variable and press [F2].The displayed answer will show 6.Please see the TI-89 family, TI-92 family and Voyage 200 guidebooks for additional info...
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Solution 12138: Font and Size of Characters Used on the TI-89 Family, TI-92 Family and Voyage™ 200 Graphing Calculators.

...alled Ti92Pluspc on the computer. On the calculator, most of the characters are 5 pixels wide by 7 pixels high in the body of the display screen. The small font in the toolbar and status line has a variable width. Those digits are mostly 3 pixels wide by 5 pixels high. For additional information,...
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Solution 15463: Finding the Amplitude of Periodic Function on the TI-89 Titanium and Voyage™ 200 Graphing Calculators.

...de of a periodic function? The amplitude of a periodic function is one-half the difference between the largest possible value of the function and the smallest possible value. For example, for y= sin(x), the largest possible value of y is 1 and the smallest possible value is -1, so the amplitude i...
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Solution 15462: Integrating Lower and Upper Bounds of a Function on the TI-89 Family, TI-92 Family, or Voyage™ 200 Graphing Calculators.

...r and upper bounds such as e^(X^2) where the lower bound is 0 and the upper bound is 1 complete these steps:• On the HOME screen press [F3]• Scroll down to the second option, 2:S( integrate, press [ENTER]• Enter the equation by pressing [diamond key] [e^] [(] [X] [^] [2] [)]• Enter a comma follow...
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Solution 11803: Viewing the Top or Bottom of a Large Matrix Result on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.

...of the [2nd] key (For the TI-92 family and Voyage 200, the shift key is located above the ON key). • Then press the up cursor (to scroll up) or the down cursor (to scroll down). Please see the TI-89 family, TI-92 family, and Voyage 200 guidebooks for additional information. Solution 11803: Viewi...
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Solution 12091: Creating a Histogram Using the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.

...5, 2, 6, 3} Input the data • Press [APPS] [6] [3]. (If the Apps Desktop is on, press [APPS], select Data/Matrix Editor, and choose [3].)• Press the down arrow twice. • In the box beside variable type a variable name. (e.g. TEST) • Press [ENTER] [ENTER].• Enter the numbers for the x values under c...
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Solution 12088: Correcting a "Domain Error" when Performing Number Base Conversions on the TI-89 Family, TI-92 Plus and Voyage™ 200 Graphing Calculators.

...culator is set to APPROXIMATE, it will return a Domain error when performing a base conversion.  To check the mode setting:• Press [MODE].• Scroll  down to the Exact/Approx setting. • Press the right arrow key.•  Select EXACT or AUTO. Another possibility is that the number being entered is not a...
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Solution 14485: Modifying the History Area on the TI-89 Titanium and Voyage™ 200 Graphing Calculators.

... Home screen, press [F1] and select 9:Format or press the green diamond key followed by the [|] key. 2) Press the right arrow key. 3) Use the up or down arrow keys to highlight the new number of pairs desired. • Press [ENTER] twice. 2. Clearing the history area and deleting all saved pairs: 1) ...
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Solution 11852: Algorithm for tCollect() Function on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.

...mpute the results for the tCollect() function? The algorithm for the tCollect( function is defined as follows: tCollect( repeatedly uses the well-known formulas for products and integer powers of sines and cosines, such as those given in the CRC tables.Please see the TI-89 family, TI-92 family a...
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Solution 14289: Backing Up the Memory of a TI-73 Family Calculator by Saving to Another TI-73 Family Model.

...t accidental loss of memory, the message MEMORYBACKUP is displayed when the receiving unit receives notice of a backup. • Press [ENTER] to select TRANSMIT and begin the backup transmission. • To prevent the backup and return to the Link SEND menu, press [2] to select Quit. When the backup is com...
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Solution 35134: Calculating Present Value (PV) on the TI-89 Family, TI-92 Family, and Voyage™ 200.

...ayments per year on PpY= 12 and press [ENTER] • Input Compounding periods per year on CpY=12 and press [ENTER] • Highlight the PV= using the up and down arrows and press [F2] this will compute with monthly interest for the Present Value of the Time value money formula Answer: PV=$191131 Note: ...
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Solution 12057: Fraction to Decimal Conversions on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.

...on keys. However, conversions can still be performed on these calculators. To convert a decimal number to a fraction: 1) Press [MODE]. 2) Scroll down to Exact/Approx. 3) Choose Exact to convert to fraction form . 4) Input a decimal number and press [ENTER]. To convert a proper or improper fra...
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Solution 12054: Finding the Curl of a Vector Field on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.

...fine it. To find the curl of the vector field refer to the example below. Example: Find the curl of the vector field F. F(x,y,z) = x * y * zi + yj + zk at point (1,2,1) Solution: 1) Press [HOME] [F4] [1]. 2) Press [2ND] [ALPHA] [c] [u] [r] [l] [ALPHA]. 3) Press [(] [X] [,] [Y] [,] [Z] [)] [=]. 4...
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Solution 12075: Viewing the Data Collected with the Calculator-Based Ranger™ (CBR™) and the Ranger Program on the TI-89 Family Calculators.

...e (the Apps desktop is usually active by default for TI-89 Titanium users). • Select 2:Open. • In the Open window, for Type, select 3: List, scroll down to variable and select the list to view (l1, l2, l3, or l4). • This will display the one list that was selected in the "c1" column. If the user ...
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Solution 12048: Changing the Scale of a Graph in The Geometer's Sketchpad® App for the TI-89 Family, TI-92 Plus and Voyage™ 200 Graphing Calculators.

...int can be used, if preferred.•  With the arrow on the selected point, press and hold the [ALPHA] key while pressing any of the 4 arrow keys (up, down, left or right) to change the scale of the graph.For TI-92 Plus and Voyage 200 users:• Press [F6] and select 4: Show Grid.• Move the arrow to s...
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Solution 11810: Calculating a Cubic Regression on the TI-89 Family, TI-92 Family and Voyage™ 200 Graphing Calculators.

...values: 0,2,3,4 Solution: 1) Press [APPS][6][3] (If the Apps Desktop is on, press [APPS], select Data/Matrix Editor, and press [3]). 2) Press the down arrow twice.  3) In the box beside Variable: type a variable name using the alpha characters (e.g. TEST). 4) Press [ENTER][ENTER]. 5) Enter the ...
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Solution 12046: Calculating Two-Variable Statistics on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.

..., 17} To Solve: 1) Press [APPS] use the arrows to select [Data/Matrix Editor] and press [ENTER]. 2) Choose [3: New] then press [Enter]. 3) Press [Down Arrow] [Down Arrow] to place the cursor in the variable box then enter a variable name for example: datab. 4) Press [ENTER] [ENTER] to open the...
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Solution 11868: Certain Polar Values Not Computed on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.

...eral minutes to compute. Simple looking inputs may generate very large exact outputs and may take a great deal of time to compute. If fast times or small output is desired, it is sometimes best to interrupt a computation and approximate it. Example: (250 < 85)*(121 < 3)/((250 < 85)+(121 < 3))...
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Solution 11865: The isPrime() Algorithm on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.

...or when the second largest prime factor has less than about 10 digits. There are faster algorithms for when this factor has more digits, but all known algorithms take expected time that grows exponentially with the number of digits. For example, the Pollard Rho algorithm would probably take c...
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Solution 11753: Finding the Area Between Two Curves on the TI-89 Family, TI-92 Plus, and Voyage™ 200.

...TER] to place the bound.• After pressing [ENTER], the intersection coordinates will display.• Repeat this procedure for both intersections and copy down the points on a scratch sheet of paper.For this example, the intersection points will come out to be (-3,-9) and (4,5).• Press [HOME] to go to t...
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Solution 12130: Difference Between the FIX and FLOAT Display Digits Mode Settings on the TI-89 Family, TI-92 Family and Voyage™ 200 Graphing Calculators.

...Display Digits setting, the full value is used for internal floating-point calculations to ensure maximum accuracy.Note: A result is automatically shown in scientific notation if its magnitude cannot be displayed in the selected number of digits.For additional information on mode settings, refer ...
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