Solution 12281: Calculating the Log and Inverse Log of a Number Using the TI-34 II Explorer Plus™.
...plorer Plus. Example: Calculate the log of 1. 1) Press the [2nd] key, then the [LOG] key to access the LOG menu. 2) With the cursor under the 'LOG' function, press [=]. 3) Input [1]. Press [)] to close parentheses. 4) Press the [=] key. The displayed answer will show 0. Example: Calculate the...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/12281
Solution 34718: Calculating Permutations and Combinations Using the TI-84 Plus C Silver Edition Calculator.
...permutations of 2 cards can be chosen from a deck of 5 cards?• Input 5.• Press [MATH], arrow right to highlight PRB, then press [2] to select the nPr function.• Input 2 and press [ENTER]. There are 20 possible permutations of choosing 2 cards from a deck of 5 cards.Example: How many possible comb...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34718
Solution 40237: TI-30XII Solar and TI-30XII Battery displays Domain Error when Entering Certain Fractional Exponents.
... does the TI-30XII Solar and TI-30XII Battery displays Domain Error when Entering Certain Fractional Exponents? The caret key has limitations for the functions it will accept for Y^X. If the below condition is met it will give a domain error: Y<0, X<1, and 1/X is not an integer For example the pr...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/40237
Solution 12295: Setting Scientific Notation Mode on the TI-34 II Explorer Plus™ and TI-34 MultiView™ Scientific Calculators.
...splay in standard notation, it will automatically display the solution in scientific notation. The TI-30X IIS/B and TI-30XS/TI-30XB MultiView, which function in the same way as the TI-34 II Explorer Plus and TI-34 MultiView, are more advanced calculators that feature the option to display all re...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/12295
Solution 12297: Squaring Negative Numbers on Texas Instruments Scientific and Elementary Calculators.
...ry calculator? These calculators use an Equation Operating System (EOS™), which evaluates from left to right, allowing the user to enter numbers and functions in a straightforward sequence. Parentheses are necessary to define the order of operations within an expression. For example, the calcula...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/12297
Solution 34612: Calculating Inverse Natural Logarithms on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
...rse natural logarithm (or e) of a number: Example: Compute the inverse natural log of .5. 1) Press [2nd] then [ln] to input the inverse natural log function (e) 2) Press [.] [5] 3) Press [enter] to complete the calculation Example: Calculate the inverse natural log of 1. 1) Press [2nd] [ln]...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34612
Solution 10687: Differences in the TI-30X and TI-30Xa.
... [k] will appear in the screen and then the [=] key will act as a constant. Another minor change is the way in which the permutation and combination functions are input. For nCr or nPr, the user used to enter [n], press x-exchange-y, enter [r], then press nCr or nPr. Now these function work like...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/10687
Solution 12312: Random Number Generator Feature on the TI-36X Solar.
... TI-36X Solar? The TI-36X Solar does not feature a random number generator. The following models in our current scientific product line feature this function: • TI-30XS MultiView™ • TI-30X IIS/B • TI-34 MultiView™ • TI-36X Pro™ Please see the TI-36X Solar guidebook for additional information. ...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/12312
Solution 10694: Clearing the Variable E on the TI-36X II.
... TI-36X II? In addition to serving as a memory variable, variable E also stores a seed value to generate a random number when using the probability functions. The seed value changes randomly every time a random number is generated.Since the variable E is classified as a system variable, the va...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/10694
Solution 10702: Unexpected Results When Sin(Pi) Does Not Return Zero on the TI-68.
...8 not give zero when calculating the sin(pi)? The answer displayed when calculating p radians is an approximation of zero. When solving trigonometric functions, very sophisticated algorithms are used to calculate the most accurate answer possible. With this in mind, plus the fact that it uses a ...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/10702
Solution 34733: Performing Degrees, Minutes, Seconds (DMS) Conversions on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
...MODE] to QUIT and return to the home screen. • Input 15.375. • Press [2nd] [APPS] to access the ANGLE menu, then press the [4] key to select the ►DMS function (convert to degrees, minutes, seconds). • Press [ENTER] to complete the conversion process. Below is an example of how to convert ...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34733
Solution 34834: Typing Text Labels on Graph Screens on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
...Knowledge Base Search How do I type text labels on graph screens on the TI-83 Plus and TI-84 Plus family of graphing calculators? The text() function can be used to create labels for graphs. The text() function writes text on graphs beginning at pixel (row, column), where 0£ row £57 and ...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34834
Solution 12250: Calculating a Hyper Geometric Probability Distribution on the TI-30X IIS/B.
...owledge Base Search How do I calculate values for a hyper geometric probability distribution on the TI-30X IIS/B? There is not a pre-defined function on the TI-30X IIS/B that will find the statistical values for a hyper geometric probability distribution. However, the formula can be ente...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/12250
Solution 20529: Incorrect Answer Received When Computing Exponents in MathPrint Mode Using the TI-30XS/B or TI-34 MultiView™ Scientific Calculator.
...w calculator? The TI-30XS/B and TI-34 MultiView calculator in MathPrint mode uses the Equation Operating System (EOS). EOS defines the order in which functions in expressions are entered and evaluated on the calculator. EOS lets the user enter numbers and functions in a simple, straightforward se...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/20529
Solution 26450: Changing the +/- sign of an answer on the TI-30X IIS and TI-30X IIB.
...change an answer from a positive number to a negative number. This key is not present on the TI-30X IIS or the TI-30X IIB units. So to perform this function on the TI-30X IIS or TI-30X IIB: • Enter your problem. ex. 88+44 and press [ENTER] You will get 132. • Now press the negate key [(-)]. T...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/26450
Solution 12255: Converting Degrees/Minutes/Seconds (DMS) to Decimal Format on the TI-30X IIS/B and TI-30XS/TI-30XB MultiView™ Scientific Calculators.
...MS: 1) With the decimal still displayed as the last answer, press [2nd] [prb]. 2) Press [6] to select the >DMS (convert to degrees, minutes, seconds) function. 3) Press [enter]. The DMS format should be displayed, 78° 12' 2". Please see the TI-30XS/TI-30XB MultiView guidebook for additional infor...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/12255
Solution 12259: Finding the Hypotenuse and Angles of a Right Triangle on the TI-30X IIS/B Scientific Calculators.
... Knowledge Base Search How can I find the hypotenuse and the angles of a right triangle on the TI-30X II/B? There is no built-in function on the TI-30X IIS/B that allows finding the hypotenuse and the angles of a right triangle. However, this type of problem can be solved us...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/12259
Solution 34773: Renaming a Program on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
... Knowledge Base Search How can I rename a program on the TI-83 Plus and TI-84 Plus family of graphing calculators? There is not a "Rename" function on the TI-83 Plus and TI-84 Plus family of graphing calculators. However, the following procedure allows the user to rename a program on t...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34773
Solution 12276: Calculating Factorials on the TI-30X IIS, TI-30X IIB, or the TI-34 II Explorer Plus.
...Plus: 1) Input the value for which the factorial will be taken. 2) Press the [PRB] key and press the right arrow key twice [®] [®] to access the "!" function. 3) Press [ENTER] to select the function, then press [ENTER] again to display the result. Please see the Scientific Model family guidebook...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/12276
Solution 33871: Finding the Reduced Row Echelon Form of a Matrix on a TI-36X Pro.
...rm of a matrix on a TI-36X Pro? To find the reduced row echelon form of a matrix, input the matrix, exit the matrix editor, and then paste the rref() function on the home screen with the name of the matrix. The example below will demonstrate this procedure: Example: Find the rref( of matrix B. ...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/33871
Solution 33891: Calculating the Determinant of a Matrix Using a TI-36X Pro.
...ress [4] [enter] [(-)] [1] [enter] [(-)] [3] enter] [2] [enter].6) Exit the matrix editor by selecting [2nd] [quit].To find the Determinant using the function:7) Press [2nd] [matrix].8) Scroll to MATH.9) Press 1: Determinant.10) Press [2nd] [matrix].11) Under NAMES, press 1: [A] 2x2.12) Press [en...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/33891
Solution 12158: Solving System of Equations Using TI-89 Family, TI-92 Family and Voyage™ 200 Graphing Calculators.
...lve system of equations on a TI-89 family, TI-92 family and Voyage 200 graphing calculator? The example below will demonstrate how to use the SIMULT( function to solve system of equations on the TI-89 family, TI-92 family and Voyage 200.For Example: Solve the following for x, y and z. 3x + 3y - 4...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/12158
Solution 12169: Typing Lower Case and Upper Case Letters on the TI-89 Family, TI-92 Plus, and Voyage™ 200 Graphing Calculators.
...and then the letter key Type a space [ALPHA] [_] (alpha function of the [(-)] key) spacebar Turn on lowercase...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/12169
Phosphate Analysis
One method of measuring the phosphate concentration is by using a Colorimeter. This instrument measures the amount of light transmitted through a sample at a given wavelength. The amount of light absorbed is mathematically related to the concentration of the solution.https://education.ti.com/en/activity/detail/phosphate-analysis
Vernier - Dissolved Oxygen
Students use the Dissolved Oxygen Probe to measure the concentration of dissolved oxygen in water from streams and rivers. They correlate the availability of dissolved oxygen to temperature, pressure, and salinity.https://education.ti.com/en/activity/detail/vernier--dissolved-oxygen