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

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1answer
326 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
794 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: ...
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2answers
984 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
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2answers
4k 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
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2answers
243 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
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1answer
5k 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 $\logâ‚‚(x)$-style logarithms. Unfortunately, its user interface contains buttons for just $\ln$ and ...
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9answers
2k 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
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1answer
99 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
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
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1answer
258 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
788 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
3k 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
63 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 ...
1
vote
1answer
5k 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
6k 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
743 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
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2answers
567 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 ...
0
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1answer
424 views

What does the hyp checkbox do on calculators?

What does the hyp checkbox do on calculators (for example on the Microsoft Windows calculator)?
-1
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1answer
983 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
13k 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
votes
4answers
105 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
242 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: ...
0
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1answer
169 views

What is the difference between * and x

For PC calculators you use * instead of x, or / instead of ...
0
votes
1answer
2k 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
420 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
4k 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
8k 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
465 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
3k 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
votes
2answers
3k 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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6answers
3k 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
votes
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 ...
1
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2answers
217 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 ...
26
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4answers
8k 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 ...
1
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1answer
793 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 ...
20
votes
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 ...