Calculator Definition and 511 Threads

Homework Statement How do I solve for x in cotx=2 by using a scientific calculator? What do I have to enter? Homework Equations N/A The Attempt at a Solution I know that I can enter tan^-1 (1/2) to find x, but is there another way to do it on a calculator?

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hey...i have designed a mechanical calculator...i am using spur gears, bevel gears and stepped drums(Leibnitz drum)...my design is ready but the problems is how do i decide the dimensions of the gears like thickness, diameter etc...do i just select a convenient size...or do i do some...

heyy...can anyone tell me where to get some stuff about mechanical calculators...like mechanisms used, their working...are gears and slide rule the only way you can make a mechanical calculator?...thanks

[b]1. sec^2(x) = (1 + sqrt3) - (1 - sqrt3)*tan (x) [b]2.sec^2(x) = tan^2(x) +1 [b]3. tan^2(x) + tan(x) + (1 - sqrt3)*tan(x) - sqrt3 = 0 tan^(x)[tan(x) +1 +1 - sqrt3) -sqrt(3) = 0 tan^2(x) + (2 - sqrt3) - sqrt(3) = 0

Let x,y be in the complex plane Say, (1+i)x+ (2+i)y -5 = 0 (3+2i)x + (4+i) -10 = 0 I couldn't solve such a system of equations with neither of casio fx-9750g, hp 50g and TI-89.. Any help would be appreciated. Thanks in advance.

I am trying to create a calculator that let's a user provide the standard deviation, mean, frequency at that mean, and range of values - then the calculator will give the frequency in that value range. For instance, purely illustrative -- say you know the mean weight for some group is 100kg...

Hi All, I've been trying to figure out how to get this formula working for a few days now, and I *refuse* to give up. There are three high points, with a line running down from each to a load W. Each of the lines A,B,C are at different angles to each other (x-y plane), and each of the lines...

Hi all, I haven't used my Voyage for a few months. It has not had batteries in it during that time. Today I put batteries in it and a column of pixels was blank. I checked 15 minutes later and it was still blank. Now, five hours later, I checked it again and the pixel column is back! What...

Homework Statement Use properties of the trigonometric functions to find the exact value of each expression. Do not use a calculator sin (-pi/12) csc (25 pi)/12 Homework Equations sin (negative angle) = - sin (angle) csc theta = (sin theta)^-1 = 1/(sin theta) The Attempt at a...

A survey of 1002 people, 701 said they voted in the last presidential elcetion. Voting records show 61% of the eligible voters voted. Find a 95% confidence interval and see if it corresponds to the 61% statistic. This is what I did. z/2 = 1.96 p hat = x/n = 701/1002 q hat 1-.6996= .3004 E=...

Hi all, I've been wondering if there is any casio calculator that's similar to Ti-89? This is because I've been using casio calculators all my life and I've tried using Ti but I'm not used to it at all. If there is such casio calculator, do you know what's the difference between both of them...

Hello guys, I have a large amount of data... and I was wondering if there is a Time Of Flight (TOF) calculator out there for particle physics? http://en.wikipedia.org/wiki/Time-of-flight

Homework Statement PV = PMT *1-(1+i)^-n / i PV = 225 * 1- (1+.0055)^-42 / .005 PV = 8417.37 How did they get this. how do you use a negative exponent on a scientific calculator. Homework Equations The Attempt at a Solution

does anyone know the mechanisms of a mechanical calculator?

I am trying to graph: r²= sinθ in Polar mode.

lim [3 + sqrt(x^2−x+1)]/[sqrt(9x^2−7x) −2x+5] x−>-infinity i know the conjugate of the nominator is 3-sqrt(x^2-x+1), but what is the conjugate of the denominator (or do i need to try some other method)? PS- I cannot solve this with deravatives b/c the teacher tols us not to

Homework Statement To implement an RPN (Reverse Polish Notation) calculator in C language. Homework Equations Implement with the help of Stacks and Pinters. No linked lists or Queues. Keep it simple. The Attempt at a Solution Here's my code: (only the driver programe)

Hi... I was just wondering if there was a program/calculator of some sort, that can solve fx. redox reactions and so on. You know, the things you know how to solve, but it takes like forever - just like finding the determinant of a 8x8 matrix. Just something that would ease the pain a bit...

How do you input x=9 on the Ti 83 graph?

What is the difference between a Programmable Calculator and a Non-Programmable one

Hi Little off topic i guess, but i am in need of a new calculator to match the level i am studying at. Soon to be 3rd year mech eng student. I have been looking at graphical calculators and the likes. Seems to be - TI - Casio - HP - Sharp and they offer several models and i...

Well, i felt ambitious and signed up for Honors Precalculus. I think i will be fine considering i love math and physics, but i need a good graphing calculator. Around $100-150 if possible. And it would be nice if it had normal physics and math constants in it (since i am also taking physics next...

Homework Statement I want to create a gpa calculator. This isn't for school I am just trying to learn some programming on my own and came up with this project. I want the output to be something like this: how many classes have you taken? grade for class 1: number of credits for...

I was doing some conversions from binary to decimal and vice versa today using Windows Calculator and I noticed the following, if I multiply B11111111 and B11111111 I get the following: B1111111000000001. Uhhh...great! What's going on here? It looks like it's rolling over the 8 LSB when it...

Hi! I was wondering if a graphing calculator (like the HP 50g, which really "turns me on") is really necessary for studying physics. I guess you're not counting much in these courses, you're just going to operate on a's and x's while using a simple calculator just to get the exact result at the...

Wolframalpha.com is a really good one. It looks like a search engine, and to find the derivative, type in d/dx(function.) To do antiderivatives, you need the symbol ∫. For limits use lim(function) as x->whatever.

Homework Statement http://img10.imageshack.us/img10/9651/mathhelp.jpg RED was given, BLUE was what I was able to find. What is the area of the shaded part? Homework Equations Area of shaded part = area of two triangles + area of sector The Attempt at a Solution I was able to find the...

Hello. I just started to learn mathematica a few days ago. I am trying to make a calculator that can graphically represent the relationship between: savings interest time the mathematical formula I am using you can see below. this is what I've written sofar...

Hi. How would you go about doing negative powers on the windows calculator? For example if you wanted to calculate 10 x 10 ^ - 3 x 2 for example what input would you use on the windows calculator? Thanks.

like many people have done with their calculators, I was dividing 987654321 by 123456789. and I realized... sum(0 to N) 987654321 * 10^(N*j) divided by sum(0 to N) 123456789 * 10^(N*j) where N can be any positive integer and j is in the real domain, there is a constant. Am I weird...

Hello my name is Kristoffer and I am new here :) I have made a spreadsheet in MS Excel to compare star-data and need some help try it out. Testing. This filesize is about 15 mb (4,5mb zip-packed) I have not taken any astronomy class or something like that. So I am not 100% sure the...

Hello, I am learning to program in C. I have to do a program for a simple calculator. It should have to menus, one the operation menu with the addition, subtraction, multiplication and division, the second one with the options new calculation, other operation and finish. I have done, there is...

C compatible with TI-89 calculator! hello. I would like to know how can I run a C programm with TI-89. Are there any programming languages that are compatible with TI?

Anyone know of books or websites that teach one how to find square roots, cube roots, sin, cosine, e, ln, pi and so forth without using a calculator because this stuff is not taught in schools, but instead is simply calculated with calculators which is not what I like considering taking things...

Hi all Does anyone have experience with a casio fx-9750 calculator? I'm trying to figure out how to convert rectangular to polar coordinates and visa versa. I have a casio fx-115 which does complex operations easily in both coordinate systems, but with the casio fx-9750 I can only figure out...

i went to this site: http://antaki.ca/TI89Tutorial/#poly and typed in different commands and none of them seem to be working. when i integrate sin(x) it just says ".989992" when i did expand((x+4)^4,x) it just says "2401." when i do factor(x^2-9,x) it says "0" so i tried factor(x^2-9=0,x)...

hello my calculator can't do Cos^4(10). my lecturer i think said that Cos(10^4) would give the same answer but i can't remember what exactly he said. Please help me!

Hi. I was wondering if anyone would share with me some insight about what calculator I should purchase? I'm a returning student in the fall, majoring in physics with engineering option. It's been so long since I've been in school though that I may end up having to take a trig/algebra II class...

This is a question from a TI-83/84 calculator exam that I took on February 14th. (haha what a shocker a math nerd without a girlfriend.) Anyway, this is one of the few that I missed, and when I revisited it I noticed that I had actually misread the question at hand. Anyway, the problem is that...

I first met with the prime numbers problem at a greek novel and than I interested with the works of Cahit Arf. Please correct me , Zeta Function Zero is a proof to tell , there is a mechanical relation at all prime numbers , and there is a regularity. If this is correct , it would be very...

My problem is that I don't understand how to really work my TI-89. Today I wanted to make more space so it wouldn't work so slowly, but I deleted majority of my applications without meaning to. I don't know how to get these applications back either, please help!

Can anyone recommend a good Feynman diagram calculator ?

I am in the first year in the cource of civil engineering in the university and i am considering buying a graph calculator and i am between hp 50g and texas instruments ti-89 titanium.every one who can help is welcome.thank you in advance.

If you like to calculate, it can help you learn cosmo basics. Partly just by making it fun. Partly because it gives a hands-on dimension to what you are learning. If you don't find calculating basic cosmo numbers fun, then this thread is not for you. There are other less number-crunchy...

Homework Statement sin²(1°)+sin²(3°)+sin²(5°)+...sin²(359°)= ? And : 1!+2!+3!+4!+...+2006!, asked are he last two numbers of this sum. Homework Equations I don't know anyThe Attempt at a Solution I don't know how to calculate Sin with your head, and 2006! is way to hard to calculate. Is...

Hello! Is there? I have a propeller fan and I want to know what is the pressure, CFM, speed, etc. based on it's blade length, the number of blades, etc. I already have a wind turbine generator and I seem can't find one for fans (propeller fan). Or is there a way to find those parameters? Any...

Estimate the change in your tax liability based on Obama's tax plan. http://alchemytoday.com/obamataxcut/

Ive never used these buttons in my life.

Something that will take me through AP Calc to the most crazy Physics or Math work that can be done... I don't use a calculator as a crutch, but I would like something that I can fall back on for common equations or problems. If it simplifies radicals I will be overjoyed.