# Tagged Questions

Questions regarding calculators such as the TI-83 (Plus), HP 50g, and other calculator models.

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0answers
31 views

### TI83+ emulator for Windows 7? (Old XP one doesn't work) [closed]

I just upgraded from XP and my old TI83+ emulator/ROM does not seem to work anymore. I understand this is probably not the right place to ask, but I know someone here will know the answer, which is ...
2answers
215 views

### How do I  find, algorithmically,  which parts of a given function are interesting to graph?

I'm building a program that does 2D graphing, and was wondering: How can I determine the default zoom level and x/y extents to display on screen, in such a way as to maximise the 'interesting' parts ...
1answer
51 views

### A calculator's solution to irrational exponent

An irrational number cannot be represented by $\frac{p}{q}$ where $p$ and $q$ are integers. And when we encounter exponents with decimal points, it is a possible way and a rather simple one to turn ...
1answer
45 views

### Checking for symmetry in a graph on the TI-84 Plus

I was using the TI-84 Plus calculator to check for Y-Axis symmetry in the graph of "cos(2X+1)" and as I had to do it fast (I was in the middle of a test), I quickly noted that it was symmetrical. I ...
2answers
64 views

### Expecting a Discontinuity in Piecewise Function on TI-89 but finding Unexpected Results

When I look at the following function $f(x)$, it would seem to me that because there are no $\le$ or $\ge$ inequalities included where the function's formula changes (for the parts relating to ...
2answers
80 views

### How can I generate a random number on my ti-84 without the rand function

Is there an equation that is possible where I enter a seed, and it will give me the number from the seed. I want it to give me the same results as the rand function would give with the seed as 0. I ...
1answer
61 views

### Getting the Total value from the Nett

I just cant figure out this formula, I thought I will take expert advice to write formula for my php script. I have a value of $\$80$.$\$80$ has come from a total sale of $\$100$and$ 20\%\$ ...
0answers
140 views

### ti 89 complex eigenvectors [closed]

I have a TI-89 calculator and when creating a certain matrix A and then use the command eigenvl(A) it gives me a Error-vectors contain complex numbers. How can I find my eigenvectors of a matrix ...
1answer
1k views

### Calculating the percentage of the difference between two values

If I have the following two different values for x: x = 0.022 x = 0.020 And, if I want to calculate the percentage of the difference (change) in x, will it be? ---> 0.022 - 0.020 = 0.002 ---> ...
0answers
57 views

### equivalent calculator keys to: inv ln

What are the equivalent keys on a calculator to inv + ln? My calculator doesn't have a inv key:
2answers
170 views

### What happens as you take repeated square roots, starting with 8? What does the answer approach as you take more and more square…

a) What happens as you take repeated square roots, starting with 8? b) What does the answer approach as you take more and more square roots? c) Would the answer be the same if you started with any ...
0answers
93 views

### How does my $10\times10$ abacus work?

How does this $10\times10$ abacus work? More specific: Counting: is it common to count from 1 to 100, or from 1 to 9.999.999? How does addition work? How does multiplication work? Are there any ...
2answers
61 views

### Calculator question involving $\log_2$?

I have a question, I have a calculator that does $\log$ but I think it does it it in a base ten format for example $\log_{10}(100)=2$ I am wondering how I can solve $\log$ using a base of 2 for ...
0answers
76 views

### Weibull Distribution Calculation Sequence

I am in the process of calculating a Weibull Distribution Calculation as follows: $1-e^{-(6.5/6.0)^2}$ Note: Last figure is a squared value. I am having trouble however remembering the correct input ...
2answers
47 views

### Calculate on which side of straign line is dot located

I am a programmer without really good knowledge in math. :/ So I have to write an algorithm that changes the color of pixel(dot) P to opposite if it's on left side of the straigt line in coordinate ...
2answers
82 views

### In a Calculator, Which Button Should be Bigger: $\sinh()$ or $\rm asin()$?

I am making a calculator app and would like to know: Which of the following functions would be used more often: $\sin()$ $\sinh()$ $\text{arsin}()$ ($\sin^{-1}$) $\text{arsinh}()$ ($\sinh^{-1}$) ...
0answers
70 views

### TI-89 calculating incorrect power regression.

I have a TI-89 and use the "Stats/List Editor" to calculate power regression. My numbers are as follows (X , Y): 10 169 15 120 20 94 25 78 30 67 35 58 When ...
0answers
121 views

### Is there any derivative that the Ti-Nspire can't do?

A fellow student was showing off by quickly have his ti-nspire solve the homework problems. Just wondering if there is any derivative that the ti-nspire would mess up on. Just where is the limit ...
2answers
102 views

### Is it possible to get any number from two numbers?

Is it possible to get any give number with a minimum value and a maximum value? to output any number you desire? for example ...
0answers
132 views

### Calculating confidence intervals for variance and standard deviation on TI 89/Stat List Editor

We're learning about problems like the ones below in my stat class right now, but my professor has no idea how to use a TI 89, so I'm usually stuck in class. Would anyone know how to solve the ...
1answer
44 views

### Help using TI-83 to find max and min…

This may be somewhat of a basic question, but I need to know... I'm trying to find the minimum and maximum for the following: $$y = \frac{\cos 3x}{5}+\sin 3x$$ How is this done on a TI-83?
2answers
852 views

### Casio fx-85GT PLUS calculator. How do I access & then use the quadratic equation formula?

Have looked in the user guide - cannot find information on use of the quadratic formula.
3answers
221 views

### How to determine end behavior with my TI-83

So, I need to determine the end behavior of $P$ for this equation: $$P(x) = −x^5 + 3x^2 + x.$$ If possible, how is this done?
1answer
106 views

### Why does calculator say that $\sqrt{4} = 2$? [duplicate]

Possible Duplicate: Square roots — positive and negative I know that the square roots of four are 2 because $2^2=4$ and $-2$ because $(-2)^2=4$ Are there any conventions in ...
2answers
376 views

### Gr. 11 Functions - Limiting domain and range on a graphing calculator

I'm trying to do a homework assignment on my graphing calculator app for my ipad (Quick graph+). (Edit by Willie: The images are originally posted here http://imgur.com/a/XRj4g I've included them ...
1answer
441 views

### How to get complex mode on a Casio fx-83GT plus scientific calculator [closed]

questions all in the title. My first question on this site! Can anyone help me?
1answer
65 views

### Is $\log_{5}{-3} = \frac{\log(3)+\pi i}{\log(5)}$?

Why does my calculator return false when I input $\log_{5}{-3} = \frac{\log(3)+\pi i}{\log(5)}$ but W|A returns true? I'm thinking my calculator is wrong because I know that \$\displaystyle ...
1answer
151 views

### Subtraction of numbers with arbitrary bases [duplicate]

Possible Duplicate: How to do +, -, *, / with number in a base b? I am reading research papers in the category of recreational mathematics on the topic of numbers similar to Kaprekar ...
1answer
164 views

### Integration from 0 to 0 - why does my calculator say “undefined” in one case, and “0” in another?

I have the following question: Using my calculator, $\displaystyle\int_0^{0} \frac{1}{x}dx$ is "undefined". But when I type $\displaystyle\int_0^{0} - \frac{\ln(1-t)}{t} dt$, the result is 0. What ...
1answer
162 views

### Drawing on calculator, Parametric Equation. What does the “pitch” do? Casio

So under options "view window" on my calculator I can't understand what the value under pitch does to the drawing. I'm just drawing simple 2D vectors. This is high school stuff, so it isn't hard. But ...
3answers
254 views

### What is the definition of $2.5!$? (2.5 factorial)

I was messing around with my TI-84 Plus Silver Edition calculator and discovered that it will actually give me values when taking the factorial of any number $n/2$ where $n$ is any integer greater ...
2answers
121 views

### Calculators: Algebraic Equations and Exams

Kind of a stupid question, but I don't have much experience with calculators and thought some of you might. I'm sitting an exam and would like to use my calculator, in particular this one: ...
2answers
274 views

### How do calculators handle $\pi$?

When the calculator displays the digits of $\pi$, how does it arrive at that answer? Also, at what digit does the approximation of $\pi$ stop at?
0answers
114 views

### How to get the LinReg(a+bx) function to display the correlation

At the beginning of the semester, when I wanted to find the correlation between two variables I would use the LinReg(a+bx) function on my TI-83 Plus calculator (you get to this function by Stat -> ...
2answers
621 views

### How do you plot $x = y^2 - 6$ on a graphing calculator?

I have a graphing calculator app (Graphing Calculator+) that only allows me to enter $x$ as a variable, but I need to graph $x = y^2 - 6$. I haven't used a graphing calculator in awhile. Is this ...
2answers
386 views

### Base-2 exponentiation bug on Citizen SR-270X for $2^{255}$?

According to my calculator, $2^{255} = 0.5$. Also, for the range $2^x, x\in[254.5, 255.5)$ the result spans $[0.3535533906, 0.7071067812]$. Outside of that, the answers seem correct. Curiosly, ...
1answer
615 views

### Casio fx-82MS: n-th logarithm

I have got a Casio fx-82MS calculator, and I want to calcuate various logarithms with it, especially $\log₂(x)$-style logarithms. Unfortunately, its user interface contains buttons for just $\ln$ and ...
8answers
558 views

### Computing a very large number

I've been making a program that can delay for any number of nanoseconds 0-65534 to any power 0-65534. That is to say, the shortest possible delay is 0^0 nanoseconds (1) and the longest possible delay ...
1answer
70 views

### Finding the range with a statistics calculator

Is there a button on statistics calculators that easily finds the range of the numbers? I am using window's pre-installed calculator.
3answers
664 views

### How can I evaluate an expression like $\sin(3\pi/2)$ on a calculator and get an answer in terms of $\pi$?

I have an expression like this that I need to evaluate: $$16\sin(2\pi/3)$$ According to my book the answer is $8\sqrt{3}$. However, when I'm using my calculator to get this I get an answer like ...
1answer
220 views

### Negative × Negative = Positive… right?

The wife and I were doing homework together, and we noticed something really strange when charting quadratics with a TI-series graphing calculator: ...
2answers
313 views

### Do calculators have floating point error?

As a programmer, we have been told about floating points errors on computer. Do Calculators have floating point error too? Example. ...
3answers
3k views

### Calculator algorithms

Does there exist a good reference on the algorithms used by calculators, especially on the trigonometric and transcendental functions? I would still like to know how Casio generates its random ...
7answers
2k views

### How to calculate $e^x$ with a standard calculator

Is there a simple method for calculating the $e^x$ ($x\in\mathbb{R}$) with a basic add/subtract/multiply/divide calculator that converges in reasonable time, preferably without having to memorize ...
1answer
42 views

### Calculating new score weight

See I have a test combined from 3 segments. The first two are 15% each, and the third is 70%. I can't do the second part, so they told me the scores would be 20% and 80% instead. Now, the scores I ...
1answer
2k views

### Financial Calculator HP 10bII - Standard Deviation with Probability

I have a financial calculator and am trying to use it to calculate the standard deviation when probability is involved. For a standard deviation question say on the numbers 1, 5, 6, 10 ...
2answers
247 views

### Numbers too large for my calculator, probability. Old calculator or should it be done another way?

It's basic binomial probability, the problem is that the numbers are to large for my calculator. Is this the point of the task, to force me to use another method? It doesn't seem lightly, because n ...
3answers
5k views

### TI-83 Plus: Is it possible to find the eigenvalues on this calculator?

I searched the Internet and can't seem to find a source on how to find the eigenvalues on a TI-83 Plus calculator. Can anyone give me a hand?
1answer
229 views

### What does the hyp checkbox do on calculators?

What does the hyp checkbox do on calculators (for example on the Microsoft Windows calculator)?
0answers
205 views

### how do you define the decimals indicator: E-3?

Sorry for the terrible question, but how do you define E-3, which is used in the calculators to indicate that the first 3 decimals in the number are not displayed ? ...
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