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

Feb2313 09:23 AM
micromass

1 
38,205 
i have an object and a 3d direction vector and position for it . I would like to know how do i determine if a certain...

Oct2510 09:57 AM
HallsofIvy

1 
1,010 
Hi,
i=e^{\frac{\pi }{2}i}=e^{\frac{5\pi }{2}i}\Rightarrow e^{\frac{\pi }{2}ii}=e^{\frac{5\pi }{2}ii}=e^{\frac{\pi...

Oct2510 09:52 AM
HallsofIvy

15 
10,904 
In the second degree equation of a conic section (ellipse/hyperbola), I have seen many books following this method to...

Oct2510 04:08 AM
zorro

4 
3,366 
Hey,
I'm studying Predicate Logic at the moment and I can't seem to wrap my head around the way that english...

Oct2410 07:08 PM
JSuarez

3 
3,644 
how displacement and velocity can be negative.

Oct2410 07:07 PM
donutz610

2 
867 
Problem: We want to calculate a polynomial of degree N1 that crosses N known points in the plane.
Solution A:...

Oct2410 05:19 PM
CRGreathouse

1 
2,015 
Given a function f : K \to K, where K = \{1,2,...,n1\}, how many permutations \sigma \in S_n exists such that...

Oct2410 01:01 PM
disregardthat

0 
759 
Can someone tell me what a riemann invariant is in general terms please? i cant find it anywhere!
thanks, lav

Oct2410 12:52 PM
slider142

1 
2,590 
This is supposed to be a proof of trigonometric multiplication of complex numbers:
http://i.imgur.com/0I9sN.png
What...

Oct2410 07:00 AM
embassyhill

2 
1,895 
Hello!
i have a vector problem. I am a currently designing a 3d game and i want my enemy ships in certain...

Oct2410 05:05 AM
badescuga

0 
693 
Howdy everyone,
I'm on a quest for something that is proving a bit elusive at the moment: a Cartesian to polar...

Oct2410 02:34 AM
chasehusky

1 
953 
Greetings,
Is a halfcircle a parabola? I am guessing yes because it is a conic section, the very bottom of the...

Oct2310 09:17 PM
CosmicVoyager

4 
4,429 
consider a function f(x)= \sqrt{2x^2x^3} if i take x^3 common from inside the cube root the function becomes f(x)=...

Oct2310 08:57 PM
disregardthat

6 
837 
Hi everyone.
Having a circle, knowing its center and radius, how can I calculate the normal vector? I need more...

Oct2310 04:34 PM
mathman

2 
2,804 
I am a student pursuing an associates degree in nanotechnology.
I would greatly appreciate a chance to talk to a...

Oct2310 03:27 PM
Kmenex

0 
1,082 
Can the definition of a bijection be extended to three dimensions? So for example,
f(a, b) = c, where f : N X N...

Oct2210 05:09 PM
pinsky

2 
1,218 
Hi all,
Can anyone show how I'd work out the analytical solution to an infinite series of this form:
...

Oct2210 06:52 AM
arildno

2 
1,265 
Hello, this is my first post here so please be kind. I have had an idea of sorts ricocheting inside of my skull for...

Oct2210 01:21 AM
3D_Mind

2 
1,454 
I got this out of An Imaginary Tale: The Story of Sqrt(1). In section 1.5 of the book, the author explains that...

Oct2110 09:57 AM
DoctorBinary

3 
3,554 
Hi,
I am not a math person. I am terrible at math and have made it to college feeling like I have missed out on...

Oct2110 05:14 AM
2rashmi1993

9 
1,423 
what is that latex font that screams "professional looking"?
I am using mathtype + power point's beamertemplate...

Oct2010 03:42 PM
Liji.h

6 
20,110 
Hello,
I have been an avid reader of the physics forum, and now I think I finally have something worth asking. The...

Oct2010 11:43 AM
trambolin

8 
8,008 
Hi there,
A quick question concerning the FFT. Let's say I explicitly know a 2D function \tilde{f}\left(\xi_1,\xi_2...

Oct2010 02:57 AM
CharlesMareau

0 
2,100 
Heya's
how would one go about spanning a vector say 'u' onto a plane spanned by vectors v1 and v2.
I have a...

Oct1910 11:11 PM
schemeng

4 
24,151 
Hi,
I think I have been having this question for some time now. What is the difference between tensor calculus and...

Oct1910 07:41 PM
slider142

2 
1,849 
Hello all:
This may be the only question I ever ask here, so pardon if I posted in wrong forum.
I work for Habitat...

Oct1910 06:04 PM
turbo

8 
799 
Hello everyone,
I have a quick theoretical question regarding probability. If you answer, I would appreciate it if...

Oct1910 04:35 PM
Kreizhn

8 
2,778 
Hello;
How do I solve an integral involving the dot product?
For example, imagine I have two vectors A and B,...

Oct1910 01:09 PM
HallsofIvy

5 
1,432 
Are lx3l or lxl3 polynomials?
If not, what would be a good example of a cubic polynomial function (R \rightarrow R)...

Oct1910 09:46 AM
HallsofIvy

1 
6,688 
1)In a hyperbola,
x^2/a^2y^2/b^2=1(standard form),
b^2=a^2(e^21)
This is in the case where b is greater than a....

Oct1910 04:47 AM
sachin123

6 
990 
Dear all,
I have a set of 5 nonlinear equations with highly complicated and long forms for which I wish to find...

Oct1810 01:49 PM
nasu

3 
3,676 
I've been trying to plot the graph of y=x^(1/x).
The positive values of x have been fine, but the negative values...

Oct1810 08:12 AM
HallsofIvy

2 
1,164 
In my Questions I usually have to calculate the Centroid of a curve whose equation is given!
I don't know the...

Oct1810 07:50 AM
HallsofIvy

6 
5,212 
I have a really bad math background, so sometimes I struggle with or am just a little slow with some algebraic things,...

Oct1710 06:54 PM
LCKurtz

1 
1,317 
I am trying to do a simple calculation to figure out how much of a certain material must be added to another to...

Oct1710 04:12 PM
Kmenex

0 
601 
We learned about cartesian coordinates briefly in class and i didnt completely understand them. Im not looking for an...

Oct1710 03:56 PM
mathman

2 
891 
The quadratic formula is, as you are well aware:
ax^2+bx+c=0 x=\frac{b\pm\sqrt{b^24ac}}{2a}
What is the cubic...

Oct1710 03:05 PM
kennysmith39

6 
2,092 
If Fmag = q(v x B) and Felectric = qE,
Florentz = q
can I say that Florentz = Fmag + Felectric?

Oct1710 10:00 AM
HallsofIvy

1 
837 
x^2*log(2)x=256^2
(2) refers to base 2
Is ther any rule to solve for x.

Oct1710 06:38 AM
arildno

6 
1,734 
Ofcourse i know how to do vectors, but i have a question about multiple vectors. when the like vectors are provided...

Oct1610 10:25 PM
jtbell

1 
992 