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Jun1-13 07:36 PM Fredrik 
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Mar10-14 04:45 PM mfb 

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General Math

- Math topics not applicable to the categories below. High-school Math
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Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:23 AM
1 33,191
A periodic function is one that ##f(\theta) = f(\theta + nT)##, by definition. However, the argument ##\theta## can be...
T 09:38 PM
1 43
Why variables (RHS) in directly proportionality are always multiplied. Suppose the newton 2nd law ...
T 07:34 PM
17 227
I'm writing a piece of code and I want to simplify a bunch of if/else statements. I need...
T 04:31 PM
15 269
Why do I feel like I am about to be fed to a pack of hungry wolves? I take it as a foregone conclusion that anyone who...
T 03:31 PM
11 264
Can anyone give me a good definition of Euler's number and its significance. I see it everywhere, it's prolific in...
T 02:48 PM
4 121
Let M=Men, D=Days, H=Hours, η=efficiency, W=Work ##MDH \propto W## ##MDH = kW## ## \frac {MDH}{W} = k## ...
T 10:58 AM
10 231
Commonly I see ##\sin(\omega t + k x)## I ask myself, if ωt is equal to θ thus kx is equal to what?? Also, the...
Y 11:02 PM
10 280
Whenever I'm on math class I've noticed that often professors, and in my online class the videos and examples all seem...
Y 03:27 PM
5 138
Given Cartesian (x,y,z), Spherical (r,\theta,\phi) and parabolic (\varepsilon , \eta , \phi ), where \varepsilon =...
Y 04:22 AM
0 107
Hello. So, I am building a camera and have ran into a problem that I feel could be solved with a semi-simple...
Apr17-14 12:59 PM
6 197
I have been wondering: Given an arbitrary geometric shape is there a sequence of tests I can perform on individual...
Apr17-14 11:35 AM
7 950
Is possible to rewrite the quadratic, cubic and quartic determinant in terms of matrices and matrix operations (trace...
Apr17-14 08:13 AM
2 146
In my previous two math classes I'd get the answer wrong if I put the number first then the variable as my answer. Now...
Apr16-14 11:48 PM
18 350
Hello, this isn't a homework problem, so i'm hoping it's okay to post here. I would like to know the correct way...
Apr16-14 09:02 AM
5 205
Guys, I may need your help. There is a question saying that how to solve the cubic function in general form, which...
Apr16-14 05:56 AM
4 270
I was studying the dot product, and it says that (a.b).c makes no sense. so if you do (a.b) can = to β and then is...
Apr16-14 05:46 AM
8 244
Who may help me with this question? Thanks. Log10(x)^log10(log10X)=10000
Apr15-14 07:43 PM
3 176
This thread does justice to a question put forth online several times and, as far as I can tell is only answered in...
Apr15-14 10:44 AM
8 213
If ##y=x^4##, so x is equal to ##\pm \sqrt{y}## or x is equal to ##\pm \sqrt{\pm \sqrt{y}}## ? Well, I think that x...
Apr15-14 09:54 AM
5 228
If I want to discuss Black–Scholes formula, where should I post?
Apr14-14 11:52 PM
1 187
Ok! So I know Newton and Leibniz invented Calculus independently and today a major part of maths requires calculus....
Apr14-14 12:54 PM
16 685
Hello may i know when to dot product and cross product?? both look to same to me..
Apr14-14 10:51 AM
2 230
It's been a while since I've dealt with sequences and series. Here is my explanation of sequences and series and let...
Apr14-14 09:44 AM
5 286
Guys, waterloo contest is coming in next week, do you guys prepare for it?
Apr13-14 06:17 PM
1 185
Is correct the following procediment? ## A \sin (\omega t) = A \sin (\phi) \to \phi= \sin^{-1} \sin (\omega t )## ...
Apr13-14 03:50 PM
2 221
just a quick question. why is two prime if its has factors, (1+i) and (1-i)?
Apr13-14 01:13 PM
8 271
Hi, My Complex Euler stuff is a bit rusty but I'm working on a problem (that I won't mention here) but I'm after an...
Apr13-14 05:18 AM
12 285
Does anyone know any cheap (preferably free) software or online tools for plotting reasonably complicated Cartesian...
Apr13-14 04:00 AM
Martin Zhao
5 234
Let's say A and B are 2 vectors with length in cm and the angle between them is 170°. Obviously, the dot product of...
Apr12-14 10:21 AM
2 226
I am having a hard time understanding the concepts of a universal property :\ What are they used for? Do they...
Apr12-14 09:48 AM
16 440
It is basically a question in computer graphics but I guess math sub-forum will suit this question. While rotating...
Apr12-14 12:04 AM
Stephen Tashi
3 259
What does the Fc and Vc stand for in this equation? Fc = Vc over Wavelength
Apr11-14 05:11 PM
1 212
In my textbook, it states that given q1 and q2 where both charges are positive and of equal magnitude, the unit vector...
Apr11-14 01:31 PM
Doc Al
20 412
If we have a function such as, $$e=\sum_{n=0}^{\infty} f(k)$$ Where 'k' can be (almost) any real value we choose...
Apr11-14 12:06 PM
27 1,199
Is it possible to create a solid whose sides are all quadrilaterals, and whose vertices are all bringing together four...
Apr10-14 09:35 PM
1 247
Digging in the wiki, I found this relation between 'arc-functions' and 'arc-functions-hyperbolics" \\ arcsinh(x)= i...
Apr10-14 03:32 PM
11 528
Is possible to compute the rate of change of x wrt sin(x)? ##\frac{dx}{d \sin(x)}##
Apr10-14 11:40 AM
11 410
So i have an equation to calculate the impossibility of pair production during photon decay into two electrons and I'm...
Apr10-14 08:39 AM
1 218
Why is the slope of perpendicular line on the the other defined this way: m = slope of a particular line m'= slope...
Apr9-14 08:36 AM
Simon Bridge
4 257
I am using multivariate linear regression to drow a best fit line. The variables that I am using are from a different...
Apr9-14 04:33 AM
0 222

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