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

learn more… | top users | synonyms

-2
votes
3answers
641 views

Find the limit $\lim_{x\to 0}\frac{1-\cos 2x}{1-\cos x}$ without using L'Hospital [closed]

Help me calculate this limit: $$\lim_{x\to 0}\frac{1-\cos 2x}{1-\cos x}$$
0
votes
1answer
12 views

Calcution's functionality & webapplication

Is there a application in Internet or a function in a calculator at windows 7 to make a caculation containing 400 and 360? It is easier to calculate if numbers have low numbers.
2
votes
0answers
188 views

Solving $x$ for $y = x^x$ using a normal scientific calculator (no native Lambert W function)?

Solving $x$ for $y = x^x$ using Lambert W function is clear enough thanks to this handy answer, but as I'm using the solution in a network support document I need it in a form that can be solved on a ...
3
votes
7answers
774 views

Why do I disagree with my calculator?

I followed the order of opperations but my answer disagrees with my calulator's. Problem: $331.91 - 1.03 - 19.90 + 150.00$ Calculator answer: $460.98$ My answer: $162.98$ Why the ...
1
vote
0answers
810 views

Multivariable polynomial long division calculator

Is there code/online calculator that divides polynomials in multiple variables? The answers are always other polynomials, but they have many variables.
1
vote
1answer
533 views

Calculator for real and complex parts of a polynomial.

Does anyone know of a nice calculator for calculating the real and complex parts of a complex polynomial. Say, for example, I want to write the polynomial $p(z)=z^3+2z^2+1$ as a function ...
0
votes
5answers
2k views

When the denominator is larger than the numerator, why does the modulo equal the numerator?

As an example, why does 1 modulo 2 equal 1? According to Google's built-in calculator: 1 % 2 = 1 5 % 40 = 5 12 % 2000 = 12 Why is the remainder not "0", ...
0
votes
2answers
582 views

Plot 1, …, Plot 3 switches on TI-83 calculator

My student has a TI-83 (I think - it is black, and newer than mine, and I have a TI-82), and she asked me what the three switches were, those at the top of the function list screen (where you input ...
1
vote
1answer
307 views

How to calculate Mortgage calculation

I have this formula for Mortgage calculation and now i want loan amount value using with same formula. ...
0
votes
2answers
571 views

Need to calculate my final marks - help

I don't know the formula to calculate my marks for a subject. The first tests accounts for 38% of the overall grade whereas the final exam accounts for 62%. Let us say that on the first test I got a ...
3
votes
1answer
65 views

Texas TI-alternatives

I've been using a Texas TI graphing calculator at school and am wondering if there are programs for the PC that function similarly (with similar features) as those calculators. I don't need an ...
3
votes
5answers
2k views

What type of input does trigonometric functions take in

I see in my Book that 45 deg is equivalent of π/4 . Ι also do the conversion if I simply convert degrees into radians like this 45* π/180 = π/4 radians and ...
0
votes
1answer
322 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 ...
0
votes
2answers
391 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 ...
1
vote
1answer
3k 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 ...
1
vote
2answers
228 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 ...
2
votes
4answers
9k views

Calculate remainder on Casio fx-991 ES Calculator

Is it possible or not to calculate remainder through use of Casio fx-991 ES Calculator. If possible then how for example :- I have to calculate remainder of ...
-4
votes
2answers
731 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 ...
3
votes
0answers
192 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 ...
3
votes
2answers
84 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 ...
0
votes
2answers
1k 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 ...
1
vote
2answers
125 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: $\sin()$ $\sinh()$ $\text{arsin}()$ ($\sin^{-1}$) $\text{arsinh}()$ ($\sinh^{-1}$) ...
3
votes
1answer
97 views

Getting the Total value from the Nett

I can't figure out this formula; I need some help to write it out for a php script. I have a value of $\$80$. $\$80$ is the profit from a total sale of $\$100$; $ 20\%$ is the percentage ...
0
votes
0answers
193 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 ...
1
vote
0answers
388 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 ...
-1
votes
2answers
114 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 ...
0
votes
1answer
80 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?
1
vote
1answer
136 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 ...
2
votes
3answers
707 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?
1
vote
2answers
2k 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 ...
0
votes
1answer
95 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 ...
0
votes
1answer
1k 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 ...
1
vote
1answer
826 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 ...
0
votes
1answer
289 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 ...
5
votes
3answers
550 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 ...
0
votes
2answers
141 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: ...
0
votes
2answers
796 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?
3
votes
2answers
3k 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 ...
9
votes
2answers
242 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 ...
0
votes
1answer
4k 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 ...
1
vote
9answers
1k 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 ...
0
votes
1answer
92 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.
1
vote
3answers
2k 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 ...
2
votes
1answer
251 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: ...
0
votes
2answers
679 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. ...
0
votes
2answers
2k 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.
0
votes
1answer
61 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 ...
0
votes
1answer
4k 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 ...
12
votes
9answers
5k 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 ...
6
votes
3answers
648 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, ...