[Home] [Manage]
Click here to launch the LaTeX Equation Editor

Name
Email
Subject   (new thread)
Message
File 
Password  (for post and file deletion)
  • Supported file types are: GIF, JPG, PNG
  • Maximum file size allowed is 10000 KB.
  • Images greater than 200x200 pixels will be thumbnailed.
  • Currently 458 unique user posts. View catalog
  • User Moderation is disabled

File: 124975086811.gif-(177.34KB, 700x880, 122240579861.gif)
3509 No. 3509 Stickied hide watch expand quickreply   [Reply] [Gallery]
/calc/ now has an IRC channel where everyone can get their math on in real time.
Feel free to join our game of multiplayer notepad at #calc on irc.99chan.org
6 posts and 1 image omitted. Click Reply to view.
>> No. 4115
>>4066
>implying he does not use a computer w/ algorithms optimized for speed


No. 2379 Stickied hide watch expand quickreply   [Reply] [Gallery]
Hello calc. Use the red link under the banner to launch the latex editor. It has many advanced functions and it's output can be quickly saved as a .gif or .png for posting to this board.
11 posts and 2 images omitted. Click Reply to view.
>> No. 4048
For help getting started, I suggest: http://en.wikipedia.org/wiki/Help:Displaying_a_formula


File: 126804669373.jpg-(100.36KB, 800x662, pandahug.jpg)
4273 No. 4273 hide watch expand quickreply   [Reply] [Gallery]
I'm looking for a "cheap algebraic trick" here, but say I have a fraction like 23/75, are there any methods to "reasonably" get an approximate single digit ratio equivalent? In this case, I can eye it up and say "okay, about 25/75, so 1/3," but I'd like a less intuitive approach to this, for when it's not so obvious.
6 posts omitted. Click Reply to view.
>> No. 4302
23/75

230/75 => 0.3
5/75
500/75 => 0.30

It's not the fastest way but accurate.
>> No. 4304
>>4302

WHAT?
>> No. 4305
File: 126871234061.jpg-(10.44KB, 256x256, 1251215351708.jpg)
4305
>>4302


File: 126869391691.jpg-(135.85KB, 500x347, 201844037_7dbd27025f.jpg)
4303 No. 4303 hide watch quickreply   [Reply] [Gallery]
hey /calc/

why is math so hard for me?

no matter how much i try i just don't get it and it's annoying and it makes me RAGE

why is that?


File: 126858170991.jpg-(82.25KB, 423x598, page1-423px-PI-12500Digits_pdf.jpg)
4297 No. 4297 hide watch quickreply   [Reply] [Gallery]
This may seem like a very childish question,
but what is so important about pi other than finding the area of a circle and the fact that it's irrational and goes on forever?
>> No. 4299
pi is one of those numbers that number theorists love more than anything else
>> No. 4301
but...why


File: 126861283865.gif-(927B, 195x51, y.gif)
4298 No. 4298 hide watch quickreply   [Reply] [Gallery]
Does anyone know why Psubscript2 = (1+3) = 2^2?
>> No. 4300
File: 126861701680.gif-(3.54KB, 329x219, CodeCogsEqn-1.gif)
4300
according to that formula
P(2) = 4, but -1 + 2-1 + 4-1 = 3
it works if you start from 1 instead of 0 or you add 1 to yours. it's the same thing.


File: 126827379773.png-(12.95KB, 760x116, Untitled.png)
4288 No. 4288 hide watch quickreply   [Reply] [Gallery]
Hey, so for our final we have to learn the Taylor series. They only gave us about a week to learn it and I still feel confused about this. Do you guys have any tips for Taylor series in general or some links to check out?

Pic related
>> No. 4289
File: 126829470029.png-(1.16KB, 169x52, tayseriesgenformula.png)
4289
Just learn the formula for it. Super easy.
Look at the picture.
that's the n'th derivative of the function f evaluated at a

a is where it is centered at
super straightforward =)
>> No. 4295
File: 126844236127.gif-(2.04KB, 537x54, CodeCogsEqn.gif)
4295
>> No. 4296
>>4295
that is equal to (3-x)^(1/2) not its second-degree Taylor polynomial


File: 12680265579.jpg-(220.77KB, 800x533, spidervan.jpg)
4271 No. 4271 hide watch quickreply   [Reply] [Gallery]
I was just outside, smoking a cigarette and watching cars pass by on the street inf ront of me, when I saw a not-too-common sight here in Chicago (at where I stay): a very shiny and nice looking car, stark silver paint with larger-than-average wheels capped with those chrome wheel centers that are very popular with people who have enough disposable income to spend on those kinds of things.

After it passed, it made me wonder: does a larger wheel apply to a greater distance passed with the same output of energy from an engine or is it entirely dependent on the engine itself? Or are there other factors to consider? I figure this was more appropriate to /calc/ than /sci/, but I'm really a layman when it comes to the more cognitive arts.
>> No. 4282
I think it's because the radius of a bigger wheel is.. well bigger, and since it doesn't take more energy to move a bigger wheel than a small (except for the small weight difference), a larger wheel with a larger radius will travel further per revolution.
>> No. 4294
>it doesn't take more energy to move a bigger wheel than a small

I think you're wrong. Maybe this would be true in the absense of resistive forces, but in the case of a vehicle the friction between the wheel and the ground means an forward-force needs to be applied to the system for a longer period of time to complete a full revolution meaning that a greater amount of energy will be spent.


File: 126821119647.png-(10.96KB, 341x239, Picture 3.png)
4284 No. 4284 hide watch expand quickreply   [Reply] [Gallery]
Suppose you were living on the surface of a torus so large that it would be impossible for you to move appreciably in any direction. Is there any way to determine the shape of your world with a test which could be conducted "localy".
2 posts omitted. Click Reply to view.
>> No. 4291
you could maybe pick three points to construct a triangle and measure the sum of its inner angles
>> No. 4292
>>4291

But that would only tell you the geometry of that area of space.
>> No. 4293
>impossible for you to move appreciably in any direction

Not in this case. I can't imagine how, anyway.


File: 126696301851.gif-(4.76KB, 378x91, algebraic.gif)
4225 No. 4225 hide watch expand quickreply   [Reply] [Gallery]
Why is this?
2 posts and 1 image omitted. Click Reply to view.
>> No. 4261
>>4233
Why (x+1)/(x+1), dumbass? Should be (x+2)/(x+2)
>> No. 4265
>>4261

That wasn't what the OP was asking.
>> No. 4290
>>4265
Well either OP can't write or he's a fucking moron. I vote for both


Delete Post []
Password  
[Mod]
Previous[0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14]