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

Feb2313 09:24 AM
micromass

1 
46,237 
I've been able to do all of them up until these two:
1) \int x\cos^{2}x dx
and
2) \int from \pi to \pi...

Jan2604 01:24 AM
himanshu121

11 
2,291 
My second course in analysis and i have a problem which i cant understand
Let f (x) = 1 if 2<=x<4
2 if...

Jan2604 11:52 AM
HallsofIvy

1 
4,155 
If the area enclosed by an ellipse 4x^2+y^2=1 and its cross section is perpendicular to the xaxis then its volume is?...

Jan2604 06:31 PM
Nachtwolf

4 
1,951 
Hi, im taking my first analysis course and we are studying Limits right now. My prof said they are the most important...

Jan2604 09:02 PM
Hurkyl

5 
1,102 
The position of a particle at time t is given by
r(t)= i cos(t) + i sin(t) + kt
Show that both the speed and...

Jan2804 06:23 PM
master_coda

5 
922 
I am having a hard time doing the following problems. First off all the notation is confusing the hell out of me. This...

Jan3004 10:35 AM
HallsofIvy

6 
11,369 
A 5.5 gram bullet is fired into a block of wood with a mass of 22.6 grams. The wood block is initially at rest on a...

Jan3004 08:07 PM
Doc Al

1 
1,182 
Hey guys, I got a little problem for ya involving trig integration. I have listed my work below. My question...

Feb104 01:20 PM
modmans2ndcoming

3 
1,433 
The force acting on a moving charge particle with mass m and charge q in a magnetic field B is the Lorentz force F=...

Feb104 01:46 PM
modmans2ndcoming

2 
1,050 
Hello everyone.
I have to solve this proof, and I'm having a little trouble. Let me explain.
<Let bold lower...

Feb204 01:30 AM
TheMadCapBeta

5 
9,945 
The base of a solid is the region bounded by the graphs of x=y^2 and x=4. "Each cross section is perpendicular to the...

Feb204 05:59 PM
HallsofIvy

5 
4,142 
Which functions have the property that some upper some equals some (other) lower sum?
Constant functions obviously...

Feb304 05:02 PM
matt grime

7 
2,693 
Here is the question
You are planning to close off a corner of the first quadrant with a line segment 20units long...

Feb404 07:29 AM
HallsofIvy

2 
5,515 
I am having trouble with the following problems:
1) lim as x > 0 of (sin 3x)/2x
2) lim as x > 0 of (tan...

Feb404 11:34 AM
matt grime

6 
11,521 
The base of a solid is a circle of radius a, and its vertical cross sections are equilateral triangles. Find the...

Feb504 07:14 AM
HallsofIvy

2 
1,457 
Stuck here too:
lim as x > 0 of /2secx
*P = pi
*Thanks for your help

Feb504 07:35 AM
HallsofIvy

4 
1,060 
I have the solution to a particular D.E. (Airy's D.E.) which is in terms of Airy functions, namely a linear...

Feb604 06:06 AM
thumper

0 
3,195 
Find the work (intergral over C )F dot dr done by a force F=yi + xj in going all the wy counterclockwise around ...

Feb604 06:17 AM
HallsofIvy

2 
825 
schröder's equation is a functional equation. let's assume A is a subset of the real numbers and g maps A to itself. ...

Feb604 05:24 PM
phoenixthoth

4 
2,744 
I'm completey lost with this one. How would I differiate the electromagnetic field?

Feb704 02:47 PM
HallsofIvy

1 
882 
I'm having trouble understanding how to find the boundary in the sense of boundary of a surface, as opposed to...

Feb804 06:22 PM
matt grime

8 
1,659 
Hi all, I've just recently been going on maths forums to find out why this problem occurs. I understand how to work...

Feb804 10:02 PM
HallsofIvy

19 
2,791 
Hi!
I am supposed to write the hyperboloid x^2 + y^2  z^2=1 as a parametric funktion and find an expression for the...

Feb1004 04:19 AM
LostInSpace

6 
1,832 
I was wondering if someone here could help me with onto and onetoone composite functions. I get the meanings of...

Feb1004 05:18 PM
Claire84

10 
6,340 
im working on these, and im supposed to find the image of a set under a given transformation. can someone please...

Feb1104 03:54 PM
wakingrufus

2 
1,456 
Just a question. I've never really had any problems learning and grasping math. Unfortunately I chose not to...

Feb1204 10:05 PM
dmbeluke

18 
6,925 
I think that i'm just having problems with my derivitives and integrals. If someone one could show me what the steps...

Feb1404 10:52 AM
HallsofIvy

1 
1,126 
At the moment I'm trying to solve this integration problem and it's not working out asd neatly as any other...

Feb1404 06:26 PM
Claire84

27 
1,730 
if R = sinti+sqrt(2)costj+sintk, 0<=t<=Pi/2
please eliminate t to determine the cartesian equation of R(t). Put...

Feb1504 10:08 PM
HallsofIvy

4 
2,298 
If f is a function defined by the fomula f(x)=xe^(modx), then show that f is differentiable at every point c, with
...

Feb1604 05:55 PM
matt grime

26 
15,190 
I need help evaluating both sides of the divergence theorem if V=xi+yj+zk and the surface S is the sphere...

Feb1804 10:27 AM
HallsofIvy

2 
3,297 
Can someone pls help me solve this integral?
integral of (6x^213x43)dx/(x^31x^28x+12)
it's supposed to be...

Feb1804 08:47 PM
Hurkyl

2 
1,573 
Can somebody show me how to integrate this:?
\int ln (sin x) dx
thanks

Feb1904 10:19 PM
turin

2 
972 
Anyone have any ideas how to solve this? (Find f'(0)
Let f(x) be a quadratic function such that f(0)=6 and
...

Feb2004 05:37 AM
phoenixthoth

2 
1,089 
Since I didn't get a response on the "Diff. Eqns." thread, I put it here.
Can someone give me a clear explaination...

Feb2004 11:07 AM
turin

3 
1,340 
After 3 days a sample of radon222 decayed to 58% of its original amount:
a) what is the halflife of radon222?
b)...

Feb2004 11:39 AM
HallsofIvy

2 
6,423 
I'm don't really know how to find the momemt of inertia. I have two questions that I'm stuck on.
Two questions:
...

Feb2004 01:18 PM
matt grime

3 
1,455 
Howdy, I'm stumped by a seemingly easy L'Hopitals limit question.
\lim_{t\rightarrow 0}\ \frac{\ln t}{t^21}
I...

Feb2004 02:46 PM
Spectre5

4 
1,699 
LOHpeetahl or LOHSpeetahl?
Thanks! I have heard it both ways recently.

Feb2004 02:59 PM
Muzza

9 
8,142 
If you have arcsecx= pi/2  arccot(sqrt(x^(2) 1) How do you actually show that these are equal to eah other. What...

Feb2104 01:38 PM
HallsofIvy

6 
3,949 