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

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2answers
376 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". ...
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2answers
57 views

An online calculator that can calculate a sum of binomial coefficients

Is there any online calculator that can calculate $$\dfrac{\sum_{k=570}^{770} \binom{6,700}{k}\binom{3,300}{1,000-k}}{\binom{10,000}{1,000}} $$ for me? There are a few binomial coefficient ...
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0answers
12 views

CAT Percentile calculation?

How the percentile score is calculated in CAT? Can anyone exactly score 100 percentile score? How can two or more people score 100 percentile each?
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9answers
8k views

How to calculate $e^x$ with a standard calculator

Is there a simple method for calculating the $e^x$ ($x\in\mathbb{R}$) with a basic add/subtract/multiply/divide calculator that converges in reasonable time, preferably without having to memorize ...
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0answers
60 views

Differentiating using Calculator Trick with Definite Derivative

Differentiate $y=sec^2(x)$ Answer in Problem Set: $2x\cdot sec^2(x)\cdot tan^2(x)$ Answer in Wolfram Alpha: $2 \cdot tan(x) \cdot sec^2(x)$ We can always solve it manually, deriving and stuff; but ...
1
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2answers
33 views

Trigonometric functions as fractions on TI-84 Plus.

I know that on the TI-84, you can use mode to change settings to fraction mode. However, when I used trigonometric functions to convert them into fractions, they gave me decimals still. Is there ...
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1answer
30 views

When would a graphing calculator make an error while plotting a function?

It is possible for a graphing utility/calculator to plot a function incorrectly... What are some possible errors that may occur? What will cause those errors?
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3answers
4k views

is there a CIS button on graphic calculators (Casio/TI)

Is there a cis (CosX + iSinX) Button in CASIO graphic calculators ? if so where its ? if no is there any turn around for it ? PS. I got a CASIO fx-9860G Thanks
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2answers
51 views

Can the difference between a number and a set of numbers be calculated as follows?

I have a number $X$ (lets say $45$) and I have five other numbers, lets say $(3, 4, ,5, 6, 7)$ I want to know the difference between my number and the other numbers like this: ...
1
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1answer
747 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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7answers
2k views

Conflicting limit answers using calculator and wolfram alpha

I want to evaluate $\lim\limits_{x\to0} \dfrac{\tan(x) - \sin(x)}{(\sin(x))^3}$, Calculator says it's 0 when substituted with 0.0000000001. Wolfram Alpha says it's 1/2. The Problem Set says the ...
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4answers
2k views

Graph the polynomial $f(x)=x^4-3x^3-4x^2+3x-2$ using a graphing calculator [closed]

Graph the polynomial $f(x)=x^4-3x^3-4x^2+3x-2$ using a graphing calculator? a) The Range b) The Real Zeros c) The y-intercept d) relative minimum and Relative Maximum e) The interval where ...
7
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2answers
3k 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 ...
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vote
3answers
19 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.
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2answers
395 views

How can I generate a random number on my ti-84 without the rand function

Is there an equation that is possible where I enter a seed, and it will give me the number from the seed. I want it to give me the same results as the rand function would give with the seed as 0. I ...
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5answers
3k views

How can I evaluate an expression like $\sin(3\pi/2)$ on a calculator and get an answer in terms of $\pi$?

I have an expression like this that I need to evaluate: $$16\sin(2\pi/3)$$ According to my book the answer is $8\sqrt{3}$. However, when I'm using my calculator to get this I get an answer like ...
2
votes
1answer
51 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
6answers
16k views

Calculate remainder on Casio fx-991 ES Calculator

Is it possible or not to calculate remainder through use of Casio fx-991 ES Calculator. If possible then how for example :- I have to calculate remainder of ...
1
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0answers
611 views

Is there any derivative that the Ti-Nspire can't do?

A fellow student was showing off by quickly have his ti-nspire solve the homework problems. Just wondering if there is any derivative that the ti-nspire would mess up on. Just where is the limit ...
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0answers
33 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 ...
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1answer
67 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 ...
3
votes
2answers
60 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: $174^{55} \pmod {221} \equiv 47$
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votes
4answers
954 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.
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1answer
34 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
36 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?
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6answers
171 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
45 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 ...
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5answers
593 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
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1answer
60 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
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1answer
80 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
vote
1answer
93 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 ...
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0answers
14 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 ...
0
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3answers
637 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 ...
0
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2answers
76 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 ...
2
votes
1answer
61 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
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1answer
5k views

Financial Calculator HP 10bII - Standard Deviation with Probability

I have a financial calculator and am trying to use it to calculate the standard deviation when probability is involved. For a standard deviation question say on the numbers $1$, $5$, $6$, $10$ ...
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2answers
75 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?
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3answers
124 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
906 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
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1answer
72 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
88 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
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3answers
56 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
73 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 ...
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1answer
39 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 ...
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0answers
39 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 ...
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2answers
149 views

In a Calculator, Which Button Should be Bigger: $\sinh()$ or $\rm asin()$?

I am making a calculator app and would like to know: Which of the following functions would be used more often: $\sin()$ $\sinh()$ $\text{arsin}()$ ($\sin^{-1}$) $\text{arsinh}()$ ($\sinh^{-1}$)
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2answers
326 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
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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 ...
0
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0answers
36 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 ...