# Tagged Questions

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

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### How to graph hypocycloid on graphical calculator

I want to know how I can graph a hypocycloid using my TI-nspire calculator. I already know the parametric equations for hypocycloids which is: Parametric Equations of Hypocycloids Does anyone know ...
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### Why won't my calculator display this fraction? [closed]

I am using my calculator to convert 2.6(457) 457 is recurring. This should be 2 6451/9990, but my calculator only displays the decimal 2.645745764. How can I fix this, incase I need to do this in an ...
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### TI-nspire CX CAS Trig Integration / Graphing

I am having trouble with the TI-nspire CX CAS solving trig integration and graphing. When I try trig integration, I get this result: Integral from 0 to 6pi of sqrt((xsinx)^2+(xcosx)^2) dx it returns ...
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### 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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### 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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### 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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### 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 ...
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### 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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### 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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### 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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### 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 $\to$ Trace...
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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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 ...
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### 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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### 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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### 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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### 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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### 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 ...
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 \$...