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

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2answers
465 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
120 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
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1answer
90 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\%$ ...
0
votes
0answers
163 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 ...
0
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0answers
275 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 ...
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2answers
112 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 ...
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1answer
68 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?
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1answer
127 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
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3answers
544 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?
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2answers
1k 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
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1answer
88 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
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1answer
613 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 ...
0
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1answer
519 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
233 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
417 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
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2answers
139 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
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2answers
607 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?
2
votes
2answers
2k 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
236 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
2k 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
8answers
976 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 ...
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1answer
91 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.
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3answers
1k 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
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1answer
239 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: ...
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2answers
519 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. ...
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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.
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1answer
57 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
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9answers
4k 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 ...
5
votes
3answers
573 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, ...
1
vote
2answers
359 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 ...
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1answer
320 views

What does the hyp checkbox do on calculators?

What does the hyp checkbox do on calculators (for example on the Microsoft Windows calculator)?
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1answer
507 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 ? ...
3
votes
4answers
9k 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?
0
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4answers
100 views

solving triangles

I have $\displaystyle\frac{56.851}{\tan(42.0892^\circ)}$, how do I figure that out on a calculator? I tried and I keep getting syntax error and I don't know how to make degrees. Google was no help ...
2
votes
1answer
196 views

How can I see alternative trigonometry solutions on a calculator?

When doing inverse trigonometric equations on a calculator, only the lowest positive solution is shown. How can I see alternative solutions (specifically for a Casio FX85ES)? Current behaviour: ...
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1answer
166 views

What is the difference between * and x

For PC calculators you use * instead of x, or / instead of ...
0
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1answer
1k views

Enter “Int” on Casio graphical calculator

Hi I know this sounds like a really beginner question, but I cannot find how to enter the terms "Int" and "Ran#" into my calculator (Casio fx-9750GII) My code is thus: 1->L 100->H Int ...
4
votes
4answers
344 views

A question about calculators (are $\sin^2 49^{\circ}$ and $\cos^2 49^{\circ}$ irrational?)

Are $(\sin 49^{\circ})^2$ and $(\cos 49^{\circ})^2$ irrational numbers? When you enter, $(\sin 49^{\circ})^2$ in a calculator, it shows a long number (and if it is irrational, then clearly the ...
2
votes
1answer
3k 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 ---> ...
0
votes
2answers
6k views

Calculator model with mod function?

I'm wondering does anyone know of a scientific calculator with a mod function? In C# this is shown as follows (just in case there are any other mods that a mathematical non-savant such as myself ...
1
vote
1answer
387 views

Ti-83 Probability of events occurring

First time here, more frequent over at StackOverflow. So not sure if calculator questions are accepted here, but I'll ask. Is there a quick way to solve problems like this in the ti-83: 82% shot ...
0
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1answer
2k views

Calculate derivatives on Casio Graphics Calculator?

Is there any way I can calculate derivatives using a Casio Graphing Calculator? Is there a program available for the calculator which can calculate them?
2
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2answers
2k views

is there a CIS button on graphic calculators (Casio/TI)

Is there a cis (CosX + iSinX) Button in CASIO graphic calculators ? if so where its ? if no is there any turn around for it ? PS. I got a CASIO fx-9860G Thanks
0
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5answers
2k views

Is there a calculator out there that shows the full answer instead of shortening it?

I'm looking for a calculator that shows a full answer regardless of it's length. For example the assignment 2^1000 will output: ...
0
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2answers
2k views

How to create an array in TI-89 Titanium calculator?

Has anyone experienced using TI-89 BASIC programming to solve math problems? I want to create an array using TI-89 but I don't know how? Update I tried both ...
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2answers
209 views

calculate x using regression equation

I calculated the cubic regression for a set of numbers following the instructions on this site: http://epsstore.ti.com/OA_HTML/csksxvm.jsp?nSetId=71235 I am wondering how do I evaluate using the ...
22
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4answers
6k 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 ...
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1answer
665 views

Advanced math software for the TI-89 (discriminant of a general polynomial?)

I was wondering if this question should be posted in this forum or in Stack Exchange, but reading both "What kind of questions can I ask here?", in Math I found Software that mathematicians use ...
19
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7answers
1k views

“Why do I always get 1 when I keep hitting the square root button on my calculator?”

I asked myself this question when I was a young boy playing around with the calculator. Today, I think I know the answer, but I'm not sure whether I'd be able to explain it to a child or layman ...