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

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2
votes
0answers
23 views

Need a calculator to evaluate functions at various inputs

I'm trying to evaluate the magnitude of an appreciably complex transfer function using a variety of input frequencies. Because I'm lazy, I really don't want to have to scroll around in the function ...
0
votes
6answers
88 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
26 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
19 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
26 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 ...
-1
votes
5answers
42 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
58 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
8 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
57 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
44 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
votes
3answers
88 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
209 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
24 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
31 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
45 views

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

How to calculate the expression easily?
0
votes
3answers
42 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
vote
1answer
35 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
29 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
votes
0answers
27 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
94 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, ...
-1
votes
5answers
96 views

Any good exponent calculators? [closed]

Can somebody give me a calculator that can do something like "5000^5000" ? I'm talking about a calculator that can do 2000 to the power of 2000 and not give me E+. Thanks!
0
votes
0answers
25 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
vote
1answer
41 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
23 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
124 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
31 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 ...
-2
votes
1answer
82 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
25 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
81 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
0answers
37 views

TI-83 gets a simple convertion to polar form wrong

I am trying to do the equation $-1-i$ converted to Polar form on the format e^i The answer (according to my own computations) should be $$ \sqrt2e^{i5\pi/4} $$ While the calculator says it is $$ ...
0
votes
1answer
33 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
0answers
37 views

Am I plugging this into the calculator correctly?

I want to make sure I am plugging these into my BA II plus correctly in order to help me when I'm taking an exam. I keep looking up how to work the calculator and I think I have gotten the steps down ...
0
votes
1answer
33 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
80 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
23 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
57 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
votes
0answers
116 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
vote
1answer
473 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
votes
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
191 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
103 views

Finding the eigenvectors using a calculator?

Can I find the eigenvectors using a regular calculator or a graphical calculator? ...
0
votes
1answer
860 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 ...
0
votes
3answers
322 views

How to solve equations with Casio FX-85WA calculator

I am testing the casio FX-85WA calculator to solve equations, so I am trying to solve a very simple one: $2x-1=3$. But I am unable to input the equal sign, as it puts the result. I've seen others ...
3
votes
1answer
150 views

Math for Future Value of Growing Annuity

Am I working this out correctly? I need to verify that my code is correct... $$1000 \cdot \left(\frac{(1 + 0.1 / 12)^{40 * 12} - (1 + 0.06 / 12)^{40 * 12}}{(0.1 / 12) - (0.06 / 12)}\right)$$ ...
1
vote
3answers
73 views

Percentage operation gives different results with two scientific calculator

The operation is: $21.99 + 9.75$$\%$ On the Texas Instruments model TI36X-Pro the answer is: $22.0875$ But when I tried on the Casio FX-991ES Plus the result is: $24.134025$ Which is the correct ...
1
vote
2answers
195 views

Weird computation error when using fnInt (numerical integral) on TI-84 Plus

Today in Calculus class I was bored so I decided to try and approximate $\pi$ by evaluating $ \left( \displaystyle \int_{-a}^a e^{-x^2} dx \right)^2$ on my calculator for larger and larger values of ...
0
votes
2answers
48 views

Drawing straight line graph with large scale

I was given the equation: $$y(x) = 10000x + 150000 ,~~ 0 \lt x \lt 60$$ and was asked to draw the graph. I know that it is a positive straight line intercepting through $150000$, but I don't know ...
4
votes
5answers
227 views

Calculate ln(x) using 8-digit calculator

I have a bit of a unique problem. Well, maybe not a problem because I'm really just curious about it, but... I have a simple 8 digit calculator. It has +, -, x, /, and a constant operation function. ...
2
votes
2answers
434 views

Simplfy a complex matrix into a real one

I encounter systems of linear complex equations (At most 3 equations) in my circuit analysis course. The calculator I am using is Casio fx-991ES and it only accepts real elements when in matrix or ...
0
votes
2answers
615 views

Graphing an ellipse on TI-nspire CX CAS

How do I graph an ellipse on a TI-nspire CX CAS? I know how to graph an ellipse with the equation $$\frac{(x-h)^2}{a^2} + \frac{(y-k)^2}{b^2 }=1$$ but I don't know how to put coefficients in the ...