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

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What are the most useful, everyday, calculator functions over and above those of a basic 4 function calculator? [on hold]

For many, a basic 4 function calculator is just too basic. Even some of the more advanced calculators are quite restricted, yet the the scientific are, for most situations, over complicated. There ...
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0answers
17 views

Is there a $\bar X$ button on the CASIO fx-991ES PLUS? [on hold]

So I have this calculator and we were doing mean exercises. In the calculator you got to write a few numbers with times then press a symbol like this: $\bar X$. I can't find it on my calculator and it ...
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1answer
13 views

Solving basic Trigonometry equations on a Ti-84 Plus [on hold]

I am trying to solve some equations for example: tanθ = 2/4 or tan15 = x/30 but I do not know how I would use a Calculator to solve these as I do not know how to format them or which symbols to use ...
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1answer
21 views

Calculator limits on a parabola

Hi guys I'm making Patrick Star for a graphing project. Anyways I'm using a parabola for his head on my TI-84 but when I set limits on it, it graphs a straight line. So the equation itself is ...
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2answers
131 views

Why are there conflicting results for integration?

Using my calculator, I had tried to evaluate the definite integral $$\int_{0}^{1}x^x \mathbf{d}x$$ However, according to my CASIO $fx-570$ES, the result was Math ERROR, which led me to believe that ...
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3answers
466 views

Wrong calculation by a calculator

Today I was working on some chemistry problems . Many of you might know it involves some big exponents. So today I just entered in one of my calculators (which might not be strong) as it was inbuilt ...
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1answer
36 views

How to correctly find CSC of an angle?

Alright, so one of my questions is CSC (angle) -5. When I plug CSC in my calculator, it says "math error." I'm using a Casio fx-300 MS, and using shift + cos, then putting an angle, such as 90.
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0answers
14 views

Program for General Form

I am trying to find the general form of the conic sections, however, I am not able to create a program that runs it. I know the way you find it is by using B^2-4AC but I would like to write a program ...
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17 views

Graphing calculator for third year undergrad applied modules

Can someone recommend me a good and affordable calculator please. I am going to sit exams like partial differential equations (method of characteristics related stuff), nonlinear dynamical systems and ...
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0answers
49 views

How can I plot a phase portrait on Ti-Nspire?

I'm trying to graph the direction field and phase portrait of a system of differential equations, but I don't know how to. I can't seem to find any tutorials online. I can only graph slope fields.
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1answer
29 views

How to use the GDC to find median from probability density function

So, for example, find the median of the probability density function $f(x) = 1.13e^{-x^2}$ for $0 \le x \le 2$. I really don't know how to use the calculator to do this. I am using TI-84.
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4answers
148 views

Rational Exponents on Calculator

I'm confused as to why my calculator is saying that $$x^\frac{n}{n}=x$$ when $n$ is an even integer. I was under the impression that $$x^\frac{n}{n}=\sqrt[n]x^n=|x|$$ when $n$ is an even integer. ...
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0answers
58 views

Pocket Calculators- Obsolete? [closed]

I hope this fits into "software that mathematicians use" within the acceptable topics for this site. Are there still any instances where pocket calculators prove useful to professional mathematicians ...
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5answers
232 views

Is $22/7$ an often used approximation for $\pi$?

It is $\pi$-day and the internet is full of stories about $\pi$. One story mentions that "an approximation -- $22/7$ -- is used in many calculations." I have never actually used $22/7$ as an ...
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3answers
90 views

How to check if the integral of a function is correct with a calculator?

As a calculus student I would like to know if there is any way to verify the "correctness" of an integral of a function using a calculator. I mean if have something like f(x) = cos(2X), the integral ...
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1answer
30 views

Symbolic operation on Ti-84 calculator [closed]

I want the calculator to answer with the parameter answer, not with a numeric value, I have tried to clear "M" variable with no success. Any idea? http://imgur.com/cHjfLln ( sorry I don't have ...
4
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1answer
81 views

A nice way to do Euler's method on a calculator?

As part of the calculator paper for IB (International Baccalaureate), we may be asked to do Euler's method, for say, 10 iterations. While it is feasible to do with a calculator (slightly easier if ...
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1answer
34 views

How to convert decimal answers into trig simplifications (symbols)?

When I use the calculator to get the result of this integral I get a decimal number. However, in my calculus book, as shown on the picture, the answer was represented using some trig symbols! Is ...
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2answers
54 views

Software to calculate an integer sum?

There is a result I want to calculate, but I don't know if there is any software that can help me with this. Anyone knows what could I use to help me? Any answer is much appreciated The formula is ...
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1answer
32 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 $\to$ ...
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1answer
28 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
36 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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1answer
81 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
99 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
386 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
43 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 ...
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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? ...
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1answer
34 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
36 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
37 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
73 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 ...
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1answer
73 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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1answer
40 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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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 ...
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3answers
82 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
585 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 ...
2
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0answers
104 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
75 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
407 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
324 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
37 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
140 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
57 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 ...
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3answers
57 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
191 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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2answers
873 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
55 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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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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0answers
726 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 ...