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

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0answers
14 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
45 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
32 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
31 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 ...
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2answers
58 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?
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0answers
67 views

Can $0^0$ be solved? [duplicate]

I noticed when attempting to solve $0^0$ on a calculator that it gave (for TI calculators) a 'ERR:DOMAIN' and Wolfram Alpha said it was indeterminate, though Google/Bing calculators give $1$ as an ...
1
vote
1answer
113 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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3answers
78 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 ...
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0answers
34 views

Finding the eigenvectors using a calculator?

Can I find the eigenvectors using a regular calculator or a graphical calculator? ...
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1answer
161 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
92 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
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1answer
105 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
43 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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vote
2answers
76 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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votes
2answers
36 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
119 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
82 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
273 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
35 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 ...
0
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4answers
249 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
200 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
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3answers
471 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
50 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 ...
1
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3answers
241 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
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3answers
629 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
44 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
85 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
109 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
votes
1answer
50 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
236 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
124 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
161 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
48 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
783 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
178 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
599 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: $$\lim_{x\to 0}\frac{1-\cos 2x}{1-\cos x}$$
0
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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
168 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 ...
3
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7answers
771 views

Why do I disagree with my calculator?

I followed the order of opperations but my answer disagrees with my calulator's. Problem: $331.91 - 1.03 - 19.90 + 150.00$ Calculator answer: $460.98$ My answer: $162.98$ Why the ...
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0answers
556 views

Multivariable polynomial long division calculator

Is there code/online calculator that divides polynomials in multiple variables? The answers are always other polynomials, but they have many variables.
1
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1answer
358 views

Calculator for real and complex parts of a polynomial.

Does anyone know of a nice calculator for calculating the real and complex parts of a complex polynomial. Say, for example, I want to write the polynomial $p(z)=z^3+2z^2+1$ as a function ...
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4answers
2k views

When the denominator is larger than the numerator, why does the modulo equal the numerator?

As an example, why does 1 modulo 2 equal 1? According to Google's built-in calculator: 1 % 2 = 1 5 % 40 = 5 12 % 2000 = 12 Why is the remainder not "0", ...
0
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2answers
492 views

Plot 1, …, Plot 3 switches on TI-83 calculator

My student has a TI-83 (I think - it is black, and newer than mine, and I have a TI-82), and she asked me what the three switches were, those at the top of the function list screen (where you input ...
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1answer
236 views

How to calculate Mortgage calculation

I have this formula for Mortgage calculation and now i want loan amount value using with same formula. ...
0
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2answers
533 views

Need to calculate my final marks - help

I don't know the formula to calculate my marks for a subject. The first tests accounts for 38% of the overall grade whereas the final exam accounts for 62%. Let us say that on the first test I got a ...
3
votes
1answer
65 views

Texas TI-alternatives

I've been using a Texas TI graphing calculator at school and am wondering if there are programs for the PC that function similarly (with similar features) as those calculators. I don't need an ...
3
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5answers
1k views

What type of input does trigonometric functions take in

I see in my Book that 45 deg is equivalent of π/4 . Ι also do the conversion if I simply convert degrees into radians like this 45* π/180 = π/4 radians and ...