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

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1answer
25 views

How to use TI-Nspire CX CAS to solve Diophantine equation? [on hold]

Such as 58x+75y=1, please tell me the command(of ti-nspire). I don't know how to define a variable as an integer. I want the general formula of the solutions.
1
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3answers
17 views

Help with calculating division with remainders on normal calculators.

I want to calculate 254 797 / 56 and when I use a calculator I get: 45478.5178571 basically I want to turn that .5178571 into the remainder. Please help.
2
votes
1answer
47 views

TI-84 gives 100 for d/dx(cube_root(x)) at x=0

My TI-84 Silver Edition is doing something strange. If $f(x)=\sqrt[3]{x}$, $\frac{d}{dx}\sqrt[3]{x}=\frac{1}{3\sqrt[3]{{x^2}}}$ At $x=0$, $\frac{d}{dx}f(0)$ is undefined. When I type ...
-2
votes
1answer
26 views

Derivation with TI-nspire CX CAS not working

I try to get the partial derivative of: $$\frac{x^2y-xy^2}{2}$$ where $x \in \mathbb{R}$ with respect to $y$.. When I type it into my TI-nspire I get $xy$, however the answer should be ...
1
vote
0answers
20 views

How to use the BA II Plus financial calculator to solve for IRR and NPV?

I've calculated the answers manually but would like to learn how to do so on the financial calculator to save time on the test and minimize errors. How to do this? Problem: You have been offered a ...
0
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1answer
35 views

How do I make my TI-89 evaluate a recursive function?

On my TI-89 I can assign variables recursively such as: $1\to x$ returns 1 $x+1 \to x$ returns 2 $x+1 \to x$ returns 3 etc. How could I do functions the same way: $x \to f(x)$ returns Done $2\cdot ...
-1
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0answers
149 views

Trying to figure out a formula for calculating New APUSH Scores.

I will include all the information I have. Math is not my strong point by any stretch but I am trying to give my students an idea of how to work on problem areas. Here is all the info I have ...
3
votes
2answers
46 views

How to find high power numbers modulo

How can I find high power number modulo number. What If I have to do it with the calculator or if the calculator is not allowed in exam. For example: $174^{55} \pmod {221} \equiv 47$
6
votes
4answers
544 views

How do pocket calculators calculate exponents?

I'd like to know specifically how a pocket calculator (TI calculators also apply) calculates $e^{0.1}$, and what methods or algorithms pocket calculators use in order to produce their answer.
1
vote
1answer
26 views

Calculation Issue (not a math problem, but I just need help with calculation)

For a) I just plugged in e to the equation and got the answer. I am stuck on the rest. So for b) I plugged in the CO2 they gave us into the e equation and then calculated e and plugged it into the ...
0
votes
1answer
34 views

Why do I get the Fibonacci sequence when I start with 1 and keep using the + sign?

I played with this on a calculator and when I entered 1 and kept hitting the + button, I got the noticeable Fibonacci sequence! Can someone explain to me why this happens?
0
votes
0answers
21 views

how to find $X^2_{0.95,14}$, $P(X^2_{9} \geq y) = 0.99$ in a TI-84 calculator?

Can someone please show the steps in how to find $X^2_{0.95,14}$ in a TI-84 calculator? My professor does not want us to use a statistics table, but to know how to use the calculator in quizzes and ...
0
votes
6answers
103 views

8 / 4 (4-2) = ? What is answer? [duplicate]

What is answer for 8 / 4 (4-2) = ? My answer is 4. But some says it's 1. And arguing each others. They even using some calculators for prove them. Even those calculators showing both 1 and 4 as ...
0
votes
1answer
33 views

Casio calculator for evaluating equations at different values

(this question is about recommending a calculator, I already asked in the chat and was invited to make an answer on the site) I'm taking Calculus 2 and I will go to Linear Algebra, Discrete ...
0
votes
1answer
34 views

Store a constant on a TI 84

On my TI 84 I have a variable E with the value 8.854e-12, ie. Epsilon not, which I use for my physics class. I also have G and M for 6.67384e-11 and 4pi e-7, both of which I have found I need for my ...
1
vote
1answer
38 views

Difference between squaring a negative number and multiplying 2 equal negative numbers?

I've seen some strange behavior on 3 different calculators. Whenever I enter -2^2, I get a -4, and when I enter -2 * -2 I get a positive 4. Why does squaring a negative and multiplying it by itself ...
0
votes
5answers
56 views

how do you type sec^2(0) on a calculator?

I press cos^-1 then ^2 then brack (o) but then it comes up with syntax error
1
vote
1answer
72 views

Why does my calculator answer .1564 for cos(90)?

I know that cos(90) equals zero but my calculator gives .1564. Everything else but trig functions work properly on my calculator. It may be broken or I might have pressed a button the changes the ...
0
votes
0answers
11 views

ti-89 get p-value from text statistics

I was wondering if anyone may know how to get p-value given test statistics. For example, I may have $F_0 = 21.59$ and I have 1df for the numerator and 8df for the denominator. Any help is greatly ...
2
votes
1answer
58 views

Why does this always equal $1$?

One of my friends told me this. Take a calculator and continuously input $\cos\tan\sin\cos\tan\sin\ldots$ any number of times you want and finally in the place of the angle measure place any value of ...
1
vote
2answers
56 views

Is a graphing calculator a necessity when one studies a higher level of maths? [closed]

Is it required, and what are the main uses and advantages/disadvantages that come with them?
0
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3answers
99 views

Is $\tan^{-1}$ for $\arctan$ on my calculator wrong?

On my calculator $\tan^{-1}$ is used to calculate the $\arctan$, but $\tan^{-1}$ actually is $\cot$. $\cot$ and $\arctan$ are not the same thing though. Am I missing something or is the labeling of my ...
2
votes
1answer
436 views

How to find antilog with simple calculator?

I know how to find log to base $10$ using simple calculator: say if you want to find log of $12$ you can do as blow: Step 1: $13$ times $\sqrt{\star} \implies 1.00030338$; Step 2: subtract 1: ...
0
votes
1answer
41 views

How do you calculate a test value that only effects your grade by a certain percentage?

My teacher has talked about how a certain test will only effect twenty percent of your final mark, how do you calculate this? Say my current total mark is 95%, I got a test score of 70%, but the test ...
2
votes
1answer
44 views

What is the answer of this problem solving question?

You need to order 4 plastic cups for each of the 800 runners. Plastic cups are sold in 2 different pack sizes and you must choose one type of pack only. A pack of 500 costs £12.50 or a pack of 800 ...
0
votes
2answers
46 views

Can i do the summation by only one single expression in calculator? How?

How to calculate the expression easily?
0
votes
3answers
45 views

Explanation of calculator percentage key

I would really appreciate some help with this question. I have asked few people but nobody could explain. When you use calculator and enter these values you get different results. Why? Example: 100 ...
1
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1answer
56 views

TI-89 factor() return value to two variables

I am writing a function for my TI-89 Titanium. I see that there is a built-in factor() function under Algebra(F2). I know that in my use case it is going to be the sum of two integers; for example my ...
0
votes
1answer
31 views

How to calculate monthly payment

I have data inside spreadsheet and it is calculationg based on formula to calculate Monthly payemnt. Now I am implementing this functionality in my HTML using ...
0
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0answers
32 views

Calculator to check derivative answer

I hope I am not off topic here, if so, feel free to remove this post. I have a Casio calculator (CFX-9850GC PLUS) that allows me to check if my derivation is correct. For example, if I want to check ...
1
vote
2answers
127 views

“How much is it more/small than” calculator.

I need to find a calculator that will essentially give me how ever much a number is smaller/bigger than another number. Example: If I enter the two numbers '1' and '4'. It will tell me, ...
0
votes
0answers
29 views

How to find the right way to pick a random selection

I love the website AnyDice (http://anydice.com). When I needed to make a dice game, it saved me hours of coding and testing. Now, I need something similar, but not for dice. I'm trying to do a ...
1
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1answer
44 views

Evaluating a decimal exponent

The example I am stuck with is $(-1)^.456$. According to my calculator, the answer is -1. According to WolframAlpha and the Google Calculator, it is a complex number. WolframAlpha -- ...
1
vote
0answers
26 views

Can't draw negative $x$ values on HP 50G

I'm unable to find an option to change the range of the function I'm plotting on the HP 50G, can anyone tell me where it is? My graphs always start with $x>0$.
1
vote
2answers
163 views

How to evaluate factorials greater than $69!$

How to evaluate factorials greater than $69!$? On my calculator, $69!$ is the largest number I can enter before it gives me a syntax error, most likely due to an overflow. Is there a way to evaluate ...
1
vote
0answers
40 views

How to make powers work right on a casio calculator?

I pressed some random buttons and it worked fine,but now its not working again. for example my calculator shows that -6^2 is - 36 and not 36, anyone know how to fix it??? My clculator model is casio ...
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votes
1answer
102 views

How to calculate to the power of 1/n? [closed]

Has anyone figured out how to calculate to the power of $1/n$ ("^1/n") on their financial calculator? I just figured I have been doing it wrong this whole time. Does anyone know the right button to ...
0
votes
1answer
26 views

Getting function into TI-83 calculator trouble

I'm trying to get $$y = -0.1t^2 + 1.2t + 98.6, \quad0 \le t \leq 12 $$ into my TI-83 calculator to graph it, but I'm having trouble figuring out the correct syntax for this one. What it would be? I ...
0
votes
3answers
103 views

How to convert a big number back to decimals when you divide 1/15000 using a basic simple calculator?

This question has always stumped me since using a simple basic calculator over 20 years ago. I'm using the basic calculator on windows or it can be any for that matter. I input the following into ...
0
votes
1answer
44 views

How to see whole answers for long floats on TI-83?

Disclaimer: I guess answers on calculators are on topic for this SE site, tried searching and found alot of non-closed/moved questions. If not, please say so and i'll be happy to move the post ...
0
votes
1answer
34 views

Where can I find a binary calculator that can do exponentiations, roots and logarithms?

I've searched on Google, but all I found was binary calculators that can do additions, subtractions, multiplications and divisions, nothing else.
0
votes
2answers
104 views

Convert a fraction to infinite repeating decimal?

We all know how to convert an infinite repeating decimal to fraction. It is simple. But now I have these fractions 10/23, 3/29, etc. I know these fractions can be written in infinite repeating ...
0
votes
1answer
24 views

Graph single equation on calculator

Just got a new Casio fx-9750gII and just wondering, since you can store up to 20 functions, how do I choose to only graph a specific one at a time? And also to choose witch one to make a table with, ...
3
votes
1answer
67 views

How to get 2 using a standard scientific calculator without pressing the number buttons 0 to 9 and the buttons $+-\times\div$?

I was challenged by a friend to get a number 2 by using a standard scientific calculator but without pressing the number buttons 0 to 9 and the buttons $+-\times\div$. I could get 1 from $\ln e=1$. ...
0
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0answers
153 views

Casio fx-83gt - help! Linear Programming

Hi guys I'm studying a module called Operational Research and in particular linear programming. I am doing the simplex method and as anyone who studies linear programming would know, you need to ...
1
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1answer
599 views

Complex number systems of equations fx-115es plus calc?

Anyone here know how to use the EQN mode on the casio fx-115es plus to find solutions to a system of equations involving complex numbers? Also, if that's not possible, what about entering complex ...
0
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2answers
74 views

Looking for a function calculator

I am looking for a calculator which can calculate functions like $f(x) = x+2$ at $x=a$ etc; but I am unable to do so. Can you recommend any online calculator?
1
vote
1answer
235 views

Calculating FV and Payments for an inflation indexed savings (graduated annuity)

I have searched high and low but I can't seem to find the right calculation to work out exactly what I need. What I need is an equation. To work out the FV of an inflation indexed savings plan. The ...
1
vote
0answers
153 views

Finding the eigenvectors using a calculator?

Can I find the eigenvectors using a regular calculator or a graphical calculator? ...
0
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1answer
1k views

TI Nspire CX CAS fails to perfrom basic integration

I plugged rather basic integral into my new calculator (TI Nspire CX CAS) just to see what it could do. Surprisingly, it returned undef and I'm wondering if ...