Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:23 AM
micromass

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
gopher_p

1 
43 
Why variables (RHS) in directly proportionality are always multiplied.
Suppose the newton 2nd law
...

T 07:34 PM
chogg

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
AlephZero

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
FactChecker

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
homeomorphic

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
micromass

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
Jhenrique

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
micromass

5 
138 
Given Cartesian (x,y,z), Spherical (r,\theta,\phi) and parabolic (\varepsilon , \eta , \phi ), where
\varepsilon =...

Y 04:22 AM
bolbteppa

0 
107 
Hello.
So, I am building a camera and have ran into a problem that I feel could be solved with a semisimple...

Apr1714 12:59 PM
Zippie

6 
197 
I have been wondering:
Given an arbitrary geometric shape is there a sequence of tests I can perform on individual...

Apr1714 11:35 AM
disregardthat

7 
950 
Is possible to rewrite the quadratic, cubic and quartic determinant in terms of matrices and matrix operations (trace...

Apr1714 08:13 AM
Jhenrique

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...

Apr1614 11:48 PM
Tyrion101

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...

Apr1614 09:02 AM
Mark44

5 
205 
Guys, I may need your help. There is a question saying that how to solve the cubic function in general form, which...

Apr1614 05:56 AM
disregardthat

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...

Apr1614 05:46 AM
HomogenousCow

8 
244 
Who may help me with this question? Thanks. Log10(x)^log10(log10X)=10000

Apr1514 07:43 PM
Mark44

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...

Apr1514 10:44 AM
DavidHume

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...

Apr1514 09:54 AM
Mark44

5 
228 
If I want to discuss Black–Scholes formula, where should I post?

Apr1414 11:52 PM
AMenendez

1 
187 
Ok! So I know Newton and Leibniz invented Calculus independently and today a major part of maths requires calculus....

Apr1414 12:54 PM
Giant

16 
685 
Hello
may i know when to dot product and cross product?? both look to same to me..

Apr1414 10:51 AM
berkeman

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...

Apr1414 09:44 AM
disregardthat

5 
286 
Guys, waterloo contest is coming in next week, do you guys prepare for it?

Apr1314 06:17 PM
jedishrfu

1 
185 
Is correct the following procediment?
## A \sin (\omega t) = A \sin (\phi) \to \phi= \sin^{1} \sin (\omega t )##
...

Apr1314 03:50 PM
HallsofIvy

2 
221 
just a quick question. why is two prime if its has factors, (1+i) and (1i)?

Apr1314 01:13 PM
SteamKing

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...

Apr1314 05:18 AM
tim9000

12 
285 
Does anyone know any cheap (preferably free) software or online tools for plotting reasonably complicated Cartesian...

Apr1314 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...

Apr1214 10:21 AM
EmSeeSquared

2 
226 
I am having a hard time understanding the concepts of a universal property :\
What are they used for? Do they...

Apr1214 09:48 AM
micromass

16 
440 
It is basically a question in computer graphics but I guess math subforum will suit this question.
While rotating...

Apr1214 12:04 AM
Stephen Tashi

3 
259 
What does the Fc and Vc stand for in this equation?
Fc = Vc over Wavelength

Apr1114 05:11 PM
SteamKing

1 
212 
In my textbook, it states that given q1 and q2 where both charges are positive and of equal magnitude, the unit vector...

Apr1114 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...

Apr1114 12:06 PM
mesa

27 
1,199 
Is it possible to create a solid whose sides are all quadrilaterals, and whose vertices are all bringing together four...

Apr1014 09:35 PM
AlephZero

1 
247 
Digging in the wiki, I found this relation between 'arcfunctions' and 'arcfunctionshyperbolics"
\\ arcsinh(x)= i...

Apr1014 03:32 PM
Jhenrique

11 
528 
Is possible to compute the rate of change of x wrt sin(x)? ##\frac{dx}{d \sin(x)}##

Apr1014 11:40 AM
1MileCrash

11 
410 
So i have an equation to calculate the impossibility of pair production during photon decay into two electrons and I'm...

Apr1014 08:39 AM
HallsofIvy

1 
218 
Why is the slope of perpendicular line on the the other defined this way:
m = slope of a particular line
m'= slope...

Apr914 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...

Apr914 04:33 AM
xeon123

0 
222 