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

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0
votes
4answers
199 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.
0
votes
2answers
56 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?
0
votes
2answers
35 views

Drawing straight line graph with large scale

I was given the equation: $$y(x) = 10000x + 150000 ,~~ 0 \lt x \lt 60$$ and was asked to draw the graph. I know that it is a positive straight line intercepting through $150000$, but I don't know ...
3
votes
1answer
99 views

Math for Future Value of Growing Annuity

Am I working this out correctly? I need to verify that my code is correct... $$1000 \cdot \left(\frac{(1 + 0.1 / 12)^{40 * 12} - (1 + 0.06 / 12)^{40 * 12}}{(0.1 / 12) - (0.06 / 12)}\right)$$ ...
1
vote
1answer
195 views

Weird stuff happening with complex numbers on a ti-84

So, I'm trying to do some calculations for my Electrical engineering homework. This requires a bit of algebra with complex numbers. I have been finding that some of the calculations that my calculator ...
0
votes
1answer
12 views

Calcution's functionality & webapplication

Is there a application in Internet or a function in a calculator at windows 7 to make a caculation containing 400 and 360? It is easier to calculate if numbers have low numbers.
-1
votes
1answer
109 views

help - how to calculate distance between to points ( latitude/longtitude) without ACOS / ATAN

I need to calculate the distance between to points (latitude/longitude) in WebI (SAP system) and I have limited formulas there (don't have : ACOS / ...
3
votes
0answers
181 views

How does my $10\times10$ abacus work?

How does this $10\times10$ abacus work? More specific: Counting: is it common to count from 1 to 100, or from 1 to 9.999.999? How does addition work? How does multiplication work? Are there any ...
2
votes
0answers
162 views

Solving $x$ for $y = x^x$ using a normal scientific calculator (no native Lambert W function)?

Solving $x$ for $y = x^x$ using Lambert W function is clear enough thanks to this handy answer, but as I'm using the solution in a network support document I need it in a form that can be solved on a ...
1
vote
0answers
14 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 ...
1
vote
0answers
31 views

Finding the eigenvectors using a calculator?

Can I find the eigenvectors using a regular calculator or a graphical calculator? ...
1
vote
0answers
527 views

Multivariable polynomial long division calculator

Is there code/online calculator that divides polynomials in multiple variables? The answers are always other polynomials, but they have many variables.
0
votes
0answers
49 views

Calculator for math/finance/statistics that can store .PDF

I need a new calculator. And rather than googling and doing research, I figured somebody on stackexchange probably know this. Requirements/facts about me Symbolic calculator (can do double ...
0
votes
0answers
413 views

equivalent calculator keys to: inv ln

What are the equivalent keys on a calculator to inv + ln? My calculator doesn't have a inv key:
0
votes
0answers
177 views

TI-89 calculating incorrect power regression.

I have a TI-89 and use the "Stats/List Editor" to calculate power regression. My numbers are as follows (X , Y): 10 169 15 120 20 94 25 78 30 67 35 58 When ...
0
votes
0answers
300 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 ...
-1
votes
0answers
22 views

How to round off (fix) a number and use it as an answer with a scientific calculator

I have been using the FIX mode in my calculator to round off numbers to $3$ decimal places for a while now. However the round off is not literal and is applied only for the displayed answer. If i use ...