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

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2answers
58 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
21 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
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1answer
52 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
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1answer
18 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
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3answers
30 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 ...
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0answers
33 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 $$ ...
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1answer
20 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
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0answers
27 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
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1answer
25 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.
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2answers
32 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
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1answer
18 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
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1answer
47 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 $\ln e=1$. ...
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0answers
45 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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0answers
107 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
62 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
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1answer
125 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 ...
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votes
3answers
80 views

Multiplication problems

Can any one confirm which solution is correct and accurate solution if we have $0.004 × 10,000 = 40$ or $0.004 × 10,000 = 000040$ also, $6.51 × 1^4 = 65100.$ or $6.51 × 1^4 = 65100$ thank ...
1
vote
0answers
39 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
314 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
2answers
120 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
116 views

Math for Future Value of Growing Annuity

Am I working this out correctly? I need to verify that my code is correct... $$1000 \cdot \left(\frac{(1 + 0.1 / 12)^{40 * 12} - (1 + 0.06 / 12)^{40 * 12}}{(0.1 / 12) - (0.06 / 12)}\right)$$ ...
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3answers
51 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 ...
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2answers
99 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 ...
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2answers
41 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
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5answers
137 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
105 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
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2answers
340 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 ...
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1answer
36 views

how can get simple function

how can get $y$ simple function of $x$ from : $$ \frac{2 \sqrt{y} \sqrt{y-b} \log \left(\sqrt{y-b}+\sqrt{y}\right)}{\sqrt{\frac{A y (y-b)}{b}}}+\text{constant} =x$$ where : $$ y=y_0 at x=0$$ and ...
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4answers
371 views

Calculator similar to Desmos but for 3D

Is there a calculator with functionality similar to Desmos but in 3 dimensions? I am looking to learn about families of quadric surfaces so I am looking for a 3D calculator with sliders.
4
votes
1answer
275 views

What exactly do the sin, cos, tan buttons do on a calculator?

I understand they mean sine, cosine, tangent, but what exactly is the calculator doing when I enter an angle and press those buttons? Edit: To help others better understand my question, my question ...
0
votes
3answers
619 views

Need a good non-graphing calculus calculator that can derive and integrate

It's my 3rd time going through Calculus II and I want to pass this class already. I'm not trying to cheat I just see people with fancy calculators and I have never even used a calculator on tests ...
0
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0answers
54 views

Calculator for math/finance/statistics that can store .PDF

I need a new calculator. And rather than googling and doing research, I figured somebody on stackexchange probably know this. Requirements/facts about me Symbolic calculator (can do double ...
3
votes
4answers
397 views

Weird stuff happening with complex numbers on a ti-84

So, I'm trying to do some calculations for my Electrical engineering homework. This requires a bit of algebra with complex numbers. I have been finding that some of the calculations that my calculator ...
16
votes
3answers
643 views

Why would a calculator have base 5?

I have a calculator that I found recently that has a base 5 option. It has options labelled HEX, BIN, DEC, OCT, and PEN. My son set it on PEN, and no numbers above 4 worked anymore. Playing around ...
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3answers
46 views

Order of powers

Which of the following is $a^{b^c}$ equal to? $a^{(b^c)}$ or ${(a^b)}^c = a^{bc}$ This is probably a really basic question but I can't seem to find the answer anywhere.
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1answer
41 views

From $\tan\varphi = -3/2 = -1,5$ to $\varphi\approx 123,69^\circ$

Sorry for this question but what do I have to type into my counter to come from $$\tan \varphi = -1,5 $$ to $\approx 123,69^\circ$ and $\approx 303,69^\circ$? Thanks!
1
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2answers
95 views

TI83+. Math-> Solver. Why does it give different solutions?

Not sure if anyone still uses this one.... Recall the keystrokes: Math 0:Solver Up arrow Enter equation Press ENTER You will now be at a prompt displaying the equation, and a line saying x=### ...
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1answer
114 views

help - how to calculate distance between to points ( latitude/longtitude) without ACOS / ATAN

I need to calculate the distance between to points (latitude/longitude) in WebI (SAP system) and I have limited formulas there (don't have : ACOS / ...
0
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1answer
51 views

Rational calculator

I am calculating a recursive equation: $X_n = \frac{1}{2}(X_{n-1} + \frac{3}{X_{n-1}})$ I need a free online calculator that can calculate for $n=7$ $(1/2)\times(88063572/50843527+(3\times ...
0
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1answer
260 views

Graphing multivariable functions

Is it possible to graph out a multivariable function (3 variables at max) on a graphing calculator? If yes, how? My instrument is the TI83.
0
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1answer
131 views

Online calculator for sha256(“foo”) mod 100 [closed]

How can most people easily solve stuff like this: sha256("foo") mod 100 google and wolframalpha didn't do it. By easily I mean like type it in an online web calculator, or use software installed by ...
0
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1answer
186 views

What is the CPLX button on a calculator?

On my cheap "dollar store" scientific calculator, it has a 2nd function button named "CPLX". When you press it, the calculator displays some text similar to the "DEG, RAD, GRAD" that says "CPLX". ...
1
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1answer
49 views

Graph of $(e^x-1)/x$ as x->0

This question may be as much computer science as math, as I don't believe the reason is mathematical; however an odd thing a classmate of mine pointed out: if you look at a graph of the function in ...
4
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6answers
818 views

How can I find the value of $\ln( |x|)$ without using the calculator?

I want to know if there is a way to find for example $\ln(2)$, without using the calculator ? Thanks
2
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2answers
181 views

In my calculator why does $\sqrt4 -2=-8.1648465955514287168521180122928e-39?$

I have tried this on my Windows 7 calculator with $\sqrt9 -3 $ it too gives some weird answer- ie$1.1546388020691628168216106791278e-37$. And so for any $n$(positive) $\sqrt n^2-n= wierd_ .answer$ Why ...
0
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1answer
1k views

Exact answers on a Ti84/Ti-nspire CX [closed]

I have three calculator: - very basic ti-30xb Multiview - ti84plus - Ti-nspire cx When I'm calculation something like $sin(60)*6$ my 10 euro Ti-30xb will give me the exact answer $3\sqrt3$. However ...
23
votes
6answers
2k views

Why does my calculator show $2^{-329} = 0?$

On my calculator, I usually get a $0$ when I divide something by $2$, a lot of times if that makes sense, but I was just wondering why does $2^{-329} = 0?$
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votes
3answers
626 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: $$\lim_{x\to 0}\frac{1-\cos 2x}{1-\cos x}$$
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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
178 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 ...