# Questions tagged [calculator]

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

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37 views

### Non-commutative multiplication on a calculator

I have a scientific calculator (Sharp EL-520R) that is usually reliable. However, I have recently come across this anomaly and hope that someone can explain it. The calculator displays ten digits ...
59 views

### Any good math calculators online to find inverse laplace transforms? Specifically $s\log\frac{s+4}{s-4}$

I think I have found the final answer $\left(4 \left[\frac{2t \cosh(4t) - \sinh(4t)}{t^2}\right]\right)$ but need to verify it.
84 views

### Is learning to calculate complex integrals really useful? [closed]

I am a high school student. I have taken the AP Calculus BC course. I scored a 5/5 on AP Calculus exam and completely mastered the concept of Integration using u substitution and other basic ...
25 views

### Logarithm value difference between calculator and table

Look at the example given at the bottom of the attached table. Log(0.003674) = -3.5652. I understand how this is procured from the log table. But if you use a calculator and plug in the numbers ...
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### I am trying to find the zeroes of this polynomial

Polynomial: $$(8.0\times10^{29})(0.010-x)(1.99\times10^{-7}-4x)^4-x=0.$$ No matter what I do can't get the graph to show up on my calculator (TI-83 plus) when I use the graphing function, so I can'...
22 views

### For standard deviation of grouped data shouldn't you have to convert frequencies given in decimals (in millions) to whole numbers.

A client of mine in Finite Math received the following data and was asked to find the sample standard deviation. (Actually, they don't specify 'sample'. This class doesn't seem to teach population ...
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### Compound Interest Formula for monthly deposits

I am currently developing a savings calculator to some set requirements, such as using a compounding interest formula. My calculator currently is annual interest only, and compounds only annually as ...
33 views

### TI Inspire CX CAS unable to do integral

Here is the math problem I am trying to do: So I want to take the integral of v(t) to get s(t) then solve for c. I typed in v(t) in my ti inspire cas, assuming it would simplify it down. However it ...
13 views

### TI Nspire CAS Implicit Differentiation not returning correct result (returning 0)

Taking the derivative of $y^3-xy=2$, the correct result should be $y'=y/(3y^2-x)$. However, when I use the impDif() function on TI Nspire CAS, the returned result is 0, as shown in the screenshot ...
52 views

### Understanding a calculator: what does “sign” mean?

I put the following input into a ti-nspire cx CAS: and it returned: What does "sign" mean?
66 views

### Matrix Calculator Tools

Does there exist any such software/online calculator where I can enter a matrix and am able to obtain the formula for an arbitrary power of the matrix? It would be an added benefit if the entries of ...
106 views

### How to find percentile of exponential distribution with ti-84 [closed]

Hello I am taking an online statistics class as part of a nursing program that I am in and we are using a free online textbook from lumenlearning. I am currently learning about uniform and exponential ...
133 views

### Values of $\left (1+\frac{1}{n}\right )^n$ on a calculator

I was reading a calculus book, and at some point the following standard limit was mentioned: $$\lim_{n\to\infty}\left(1+\frac1n\right)^n=e$$ Afterwards, the author of this book invited the reader to ...
23 views

### Finding Poisson Critical Region with Casio CG-50

I am trying to figure out how to get the critical region for a Poisson distribution on a CG-50. On the classwiz, you could enter desired values into a table and the poisson value would be returned on ...
31 views

### Use of Multi-Statements (Casio fx-85GT)

The CASIO fx-85GT Plus has a 'colon' character which can be used to perform multiple statements in turn. The instruction manual gives the following example: (there is a similar description on the ...
45 views

### Are there formulas to find roots of n-th degree polynomials?

I have tried a polynomial equation of 7th degree on WolframAlpha but it didn't give me exact forms. Does this mean there are not general formulas for every polynomial equation and calculators use root-...
79 views

### How does the calculator solve definite integrals?

What process do most calculators use to calculate indefinite integrals? My teacher told me that calculators are really good at doing definite integrals, but they aren't so good at finding the ...
24 views

### help needed with a percentage calculation [closed]

so in this example when i calculate 10000+1% its shows 10100 but with my casio fx 991 es plus shows 10000.01 please help I'm stuck
26 views

### result in math mode like radicals and fractions on casio fx-992

I want to solve the equation $$z^2 -(\sqrt{3} +\mathrm{i}\sqrt{2}) z + \mathrm{i} \sqrt{6}=0$$ Using the casio fx-992 plus calculator. To do this, I followed the instructions given in this video: ...
33 views

### Scientific calculator that can expands polynomial like $(x^2+1)(x+1)(x-3)$

Is there a scientific calculator that can expands a polynomal like $(x^2+1)(x+1)(x-3)$? Any scientific calculator like Texas Instruments can do that?
31 views

### Which calculator will be useful here?

I want to factor the denominator of this expression $\frac{1}{bu^2-2au-b}$ so that I get this expression $-\frac{b}{(-bu+\sqrt{b^2+a^2}+a)(bu+\sqrt{b^2+a^2}-a)}$. I used hp 50g calculator with ...
221 views

### How do I round up on a TI-84+ [closed]

I'm using a TI-84+ and am trying to setup an equation that requires rounding up I know how to round and round down with the TI-84 but I can't seem to figure out how to round up Edit: the 'round ...
99 views

### Keeping the numbers in fraction only while Matrix Multiplication in a scientific calculator

While performing a matrix multiplication on my scientific calculator (CASIO fx-991ES PLUS), I realized that the calculator gives out the answers in decimals (approx. decimals in case of irrational ...
58 views

### $\sin\left(\frac{\pi}{16}\right)$ not working on Ti-89

If I ask TI-89 to evaluate a special angle like $\displaystyle \sin\left(\frac{\pi}{3}\right)$ or $\displaystyle \sin\left(\frac{\pi}{4}\right)$ I get back nice fractional results. But if I ask for ...
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### Steps for solving amortizing payment formula using handheld calculator

What are the steps for solving this equation on a handheld calculator? Where should I start? I know many calculators have functions to do this quickly, but this is more a question about using a ...
325 views

### TI-nspire CX CAS giving weird/incorrect indefinite integral

I am testing out the new TI-nspire CX CAS I just got with some simple indefinite integrals. I used the integral of $$\int \sec^3(x) dx$$ My nspire gives me:  \frac{\cos^2(x)\ln\left(-\frac{|\...
51 views

### Calculator giving weird answer when dividing factorial

I am using a TI-34 MultiView I was trying to divide the following 20!/(17!3!) The answer should be 1140 right? the numerator is 2.43*10^18 the denominator ...
28 views

### Is there a way to input a variable (such as x) into my calculator for use with integrals or derivatives?

There is a button on my calculator dedicated to derivatives and integrals, but I've never been able to use it because I don't know how to represent a variable (it seems the only thing I can derive or ...
88 views

### Integrate $\int 2x\sin{(x^2+x)} \,dx$

Evaluate $\int 2x\sin{(x^2+x)} \,dx$ using integration by parts. Let $u=2x$ and $dv=\sin(x^2+x)dx$ and I got that $du=x^2dx$. I'm stuck when integrating $\sin{(x^2+x)}$. Then I tried the integral ...
132 views

### why cant algebra calculators without graphing involved solve this equation $2^x=3x-1$?

I know you can plug in 1 and get the answer, but im curious as to why some websites with algebra calculators cannot solve the equation unless the website has some sort of graphic calculator also ...
### How can $\frac{4}{3} \times 3=4$ if $\frac{4}{3}$ is $1.3$? [duplicate]
Ok use your closest calculator, and type $\frac{4}{3}$, which is $1.3333333333$,and then multiply it with $3$ which is $3.9999999999$ but then type $\frac{4}{3} \times 3=4$ how?. How can it be $4$ if \$...