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

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1answer
19 views

How to find $x$-intercept on TI-83/TI-84 calculator without having to set the bounds for each intercept?

Finding $y$-intercepts is very easy on a TI-83/TI-84 calculator. All you have to do is graph the function and use 2nd $\to$ ...
2
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2answers
2k 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: ...
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0answers
5 views

How to calculate the limit of a trigonometric function on Ti-nspire Cx CAS [on hold]

nspire CX CAS calculator for my calculus course i am trying to solve a problem, but it gives me undefined. I am wondering, if anyone else have encounter same problem? ...
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1answer
22 views

Hexadecimal arithmetic on calculator (casio etc.)

When I do hexadecimal subtraction say, 2A-324 on a casio calculator or any calculator in general, i get the result as FFFFFD06 Why do i get so many F's ?? dosnt F stand for 15 in hex. In any general ...
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2answers
35 views

Help buying a calculator program [closed]

Is there an economical calculator program I can buy that will let me multiply and divide numbers in the hundreds of digits and show all of the digits?
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7answers
1k views

How calculators do trigonometry [duplicate]

I need to use a calculator to find trigonometric ratios like $\sin(41),\cos(32)$. How do calculators work for trigonometry? Also, as calculators are invented by the human mind can we do it mentally? ...
21
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7answers
2k views

“Why do I always get 1 when I keep hitting the square root button on my calculator?”

I asked myself this question when I was a young boy playing around with the calculator. Today, I think I know the answer, but I'm not sure whether I'd be able to explain it to a child or layman ...
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2answers
45 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
10k views

Calculator model with mod function?

I'm wondering does anyone know of a scientific calculator with a mod function? In C# this is shown as follows (just in case there are any other mods that a mathematical non-savant such as myself ...
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3answers
6k views

How do you plot $x = y^2 - 6$ on a graphing calculator?

I have a graphing calculator app (Graphing Calculator+) that only allows me to enter $x$ as a variable, but I need to graph $x = y^2 - 6$. I haven't used a graphing calculator in awhile. Is this ...
3
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1answer
68 views

Why Can my Phone Calculator do $e^{\pi\sqrt{-1}}$ but not $\sqrt{-1}$?

When I type in the identity $e^{\pi\sqrt{-1}}$ on my phone calculator (LG phone running Android), I get the correct result of $-1$ However, when I simply type $\sqrt{-1}$, it returns an error. Why ...
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2answers
30 views

Simplifying an exponential expression.

maybe this is a stupid question but I have the following expression: $ 10^{-18}(e^{50,9702078⋅0,75}) = 10^{-18}(4⋅10^{16}) $ How would I go about simplifying the big exponent on the left to what's ...
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2answers
92 views

what does sin button do? I have always wondered why calculators have this function [closed]

What is the sin button on a calculator used for? I have always wondered why and how you would use this function.
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3answers
312 views

Express “if true, then 1 else 0” in a formula suitable for Desmos calculator

In programming, often the value of True is also 1, and False is 0. This means that: (x>5)*4 will return 4 if x is greater than 5 (because ...
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1answer
40 views

Raising i to a large power on a Ti-83

When I input this on my graphing calculator I get the correct answer: i^4 1 However when I do this with larger numbers I get a weird answer ...
2
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1answer
76 views

TI-84 gives 100 for $\frac{d}{dx}\sqrt[3]{x}\,\big|_{x=0}$

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 ...
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1answer
27 views

How can I use the solve() function inside of itself?

I'm trying to use the solve function recursively on my TI-89 calculator. Minimal example to demonstrate the concept: ...
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2answers
29 views

How to find values of trigonometric functions, using identities and a calculator?

Recently I have been covering trig identities in maths. One part of this is for example is being able to calculate another angle whose sine is is $0.990$, given that $\sin 98^\circ = 0.990$. Obviously ...
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1answer
33 views

How to calculate distance formula in fx-991MS calculator?

For formula $X=\sqrt{(A-B)^2 + (C-D)^2}$, how do I store this formula and take the values for A,B,C,D to get the value for X quickly without wasting time to write again the whole thing.
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1answer
57 views

Find the absolute and relative error for a calculator with incorrect rounding

A calculator is out of order. The calculator will round up every single number to the nearest integer if the value at the first decimal digit is 6 and above, or else it rounds down the number to be ...
2
votes
1answer
35 views

What does my TI-83 or other TI graphing calculators use to numerically approach certain integrals?

I assume that most graphics calculators try to solve things analytically (where possible within reasonable computing time and power). Otherwise do they use numerical approximations for definite ...
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1answer
52 views

Calculating number of subgroups of explicit order in Magma Calculator

I have a group, given by direct product of $A_4$ and $D_6$. The exercise is to find all p-Sylow subgroups of $A_4 \times D_6$ without the use of 3rd Sylow theorem. I am confident I can find the ...
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2answers
101 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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4answers
3k 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.
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1answer
468 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 ...
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0answers
12 views

Systems of linear equations (limiting probability) in TI-84?

I changed the usual pi symbols to letters to make it easier to read. a= 1/4a + 1/4c + 1/4d b= 1/4a + 1/4b + 1/4c +1/4d c= 1/2a + 1/2b + 1/4c a + b + c + d = 1 Here are the answers. a= 3/16 ...
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0answers
45 views

How to mathematically calculate this?

I want to know "energy price" to conduct panel data analysis. But I cannot find it on database of all web-sites. On all database, enegy price is unavailable. And according to my reseach, it's said ...
0
votes
3answers
57 views

Why does my calculator show -2^2 as -4

I'm worried that this will be a spanner in the works when I'm using a calculator in an exam , I know that $-2^2= 4$ since $(-2) \cdot (-2) = 4 $. So why does my calculator show it as negative 4 ? Does ...
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3answers
550 views

Is there a way to use a calculator for logarithmic form equations that aren't base 10 or base e?

Is there a way to use a calculator for logarithmic form equations that aren't base 10 or base e? I just find this really hard to believe and quite unacceptable that the only way to do this is ...
9
votes
2answers
6k 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 ...
2
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0answers
81 views

What is logarithm & how log table can be constructed by me?

I'm studying properties of logarithm but I don't understand how base e works. Base 10 looks simple while doing calculations of numbers having multiple of 10. As other numbers are not multiple of 10 ...
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1answer
51 views

How to use Beta Distribution

Like the title says how do I use this. Especially in a case where $P(X \le 0.5)$ and harder cases where there are 2 bounds like $P(0.25 \lt X \lt 0.5)$. I am using a TI-84 graphic calculator The ...
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1answer
232 views

Drawing a picture with equations

I have a school project where I have to create an image on my calculator by forming equations. I want to create the Apple logo and have been trying a lot but I can't come up with any equations. My ...
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3answers
157 views

Is there a way to calculate lg on a scientific calculator?

Taking introduction to algorithms for computer science this semester and wanted to know if there is a way to calculate lg on scientific calculator? Thank you.
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1answer
31 views

I have an error when calculating “areas under a graph”

Q: Some computer algebra systems have commands that will draw approximating rectangles and evaluate the sums of their areas, at least if Xi is a left or right endpoint (for instance in Maple use ...
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1answer
134 views

Calculating a sum which includes binomial coeffeicients

Some formula for calculating the probablity that the difference between the number $6$ and the average of accidentally selected $100$ points among $10000$ points which are distributed in the interval ...
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1answer
35 views

Why are there different methods to finding quartiles?

On different programs and types of technologies there are different algorithms used to find quartiles. Ti 83 Plus will spit out an answer different from Excel or minitab etc. Why are there so many ...
3
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3answers
52 views

Difference between $(-x)^{1/n}$ and $-x^{1/n}$?

I know these seems to be splitting hairs, but according to two different calculators, there's a real difference. For e.g, $(-8)^{1/3}$ computes to NaN, where $-8^{1/3}$ computes to $-2$. Though am ...
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2answers
564 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
108 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 ...
13
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9answers
11k 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
374 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 ...
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2answers
384 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 ...
3
votes
3answers
5k 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
55 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: ...
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1answer
1k 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 ...
14
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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 ...
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3answers
25 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
536 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 ...