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

Feb2313 09:23 AM
micromass

1 
36,861 
Are there any complex solutions to cos x = 2?

Y 08:15 PM
johann1301

3 
122 
Obviously it will take some bruteforce. But how do I minimize the bruteforce needed (optimize)? I know one can solve...

Y 04:41 PM
jedishrfu

1 
105 
A function f(x) where f(x)=length of the graph curve/line from 0 to x
Can this function be expressed in algebraic...

Y 11:08 AM
MrAnchovy

8 
256 
I was wondering how that could be done.
I...

Y 10:19 AM
George Jones

2 
118 
So it was my observation that all the prime numbers I saw ended with digits 1,3,7,9.Is this true for all primes? Is it...

Y 09:21 AM
micromass

8 
124 
Why are perfect numbers important?
What is the best way of introducing these numbers to a first course on number...

Y 03:55 AM
micromass

2 
148 
If you rotate your rectangular coordinate system (x,y) so that the rotated x'axis is parallel to a vector (a,b), in...

Jul2114 05:03 PM
George Jones

1 
110 
Hi!
I posted a new thread about a week ago, but so far no one was able to help me:
...

Jul2114 02:21 PM
Tusike

0 
86 
consider a sin wave
to find the average of this function over interval 2pi, why not just do...
...

Jul2114 01:49 PM
George Jones

4 
215 
reliability means the probability of device that device will perform for given time interval under given condition
or...

Jul2114 10:06 AM
vead

0 
88 
Our company is holding a weight loss contest consisting of 5 people teams. If one of the people weigh in but cant...

Jul2114 03:08 AM
20GT

22 
633 
Hello,
What is an affine function? My professor has been throwing around this term in the lecture videos and I have...

Jul1914 11:42 PM
SteamKing

1 
280 
Guys,
I have a problem I'm trying to solve for work (we're trying to inspect a hole, and I'm trying to determine...

Jul1814 01:48 PM
bahamagreen

4 
386 
Hi everyone! I am looking for an equation for a projectile which takes into account air resistance. I preferably want...

Jul1814 12:47 PM
mfb

1 
212 
I always thought the derivatives (or generally any operation with infinitesimal (infinitely large) values) belongs to...

Jul1814 11:44 AM
micromass

27 
1,299 
Suppose I have three statements of congruence:
x = a mod n, y = b mod m, z = c mod p;
Furthermore, x is a given...

Jul1814 08:38 AM
1MileCrash

2 
275 
I was doing some basic analysis of the Dedekind eta function and some Dirichlet series and the following equality just...

Jul1814 07:50 AM
Simon Bridge

1 
359 
I am puzzled by the following example of the application of binomial expansion from Bostock and Chandler's book Pure...

Jul1814 12:17 AM
Simon Bridge

7 
2,004 
Let's say I wanted to do the following calculation: (x^2 + 2x + 1) / (x+1)
I've scrolled through some online...

Jul1714 03:02 PM
symbolipoint

14 
786 
I am a UK iB student who has just finished year 12 (penultimate year) of secondary education.
As part of the iB I...

Jul1714 03:04 AM
austrosam

2 
497 
Hi! I came across the below thread where a user ('krackers') asked for a proof of the PSF factorising method for...

Jul1714 01:15 AM
bairdos

1 
395 
Hi,
I visited my Mother and Stepfather recently, and admired the tall trees around their house.
We estimated...

Jul1614 06:04 PM
micromass

8 
992 
I know how to prove this via limits and I'm okay with that.
What I want to understand is the interpretation of the...

Jul1514 08:20 PM
AlephZero

3 
548 
My question is somewhat dumb but for some reason I haven't been able to come up with an answer.
Why is the...

Jul1414 02:31 PM
jbunniii

4 
962 
Please see the attached,which was quoted from the following website:
http://en.wikipedia.org/wiki/Modular_arithmetic...

Jul1414 09:42 AM
Delta²

7 
1,076 
Hi, I was wondering if there is a way to prove the area of the Koch Snowflake via induction?
At the moment I have the...

Jul1314 10:04 AM
Simon Bridge

1 
716 
Hi all,
During my research i ran into the following general type of equation: \exp(ax+b)=\frac{cx+d}{ex+f}
does...

Jul1314 07:30 AM
HallsofIvy

3 
963 
for about first 429407636 pi digits
where can i get such software or how can i calculate it? (i have 1b pi digits)

Jul1214 12:12 AM
jedishrfu

1 
1,068 
Hello all, I am looking for exact forms (as real number expressions) of the golden ration that are not rewrites of the...

Jul1114 10:50 AM
mesa

2 
1,100 
I was recently told that base Pi can only be speculation because it irrational. However the Euler formula uses e. e is...

Jul1114 08:52 AM
HallsofIvy

6 
1,199 
As a programming exercise I wrote a program to generate primes. First I generated a billion of them (the one billionth...

Jul1014 08:08 PM
HallsofIvy

2 
935 
Does anyone know of an online calculator that can form an equation of a curve with complex values and lots parameters?...

Jul1014 08:06 PM
symbolipoint

1 
873 
If the Parallel Axiom is just one of several possible assumptions, why is it that so many mathematical relationships...

Jul1014 05:15 AM
maline

2 
1,036 
Hi,
I have a question about : http://imgur.com/RU7PvtJ
I actually understand what I need to do. I need to see...

Jul914 08:28 PM
chemistry1

4 
909 
Hi, I'm having trouble understanding the following fact about limits :
If f(x)<=g(x) for all x on (a,b) (except...

Jul914 08:00 PM
chemistry1

4 
935 
Just recently I decided to buy an ozone generator that can produce 4 grams of ozone / hour. However, I did a little...

Jul914 05:57 PM
MrAnchovy

13 
1,605 
I want to learn algebra II, trig and calc over the summer but I have a terrible time learning by reading, so is there...

Jul914 04:08 PM
HakimPhilo

4 
1,610 
We know that i^3 is i .
But I am getting confused, because I thought that i can be written as √(1) and i^3 = √(1)...

Jul914 03:59 PM
HakimPhilo

6 
1,344 
Why did Germain come up with her Germain primes? I am intrigued to know why Sophie came across these primes. Do they...

Jul914 10:20 AM
micromass

1 
849 
I'm wondering if Pi is a rational number in any other base besides base Pi. Also is there a formula or function to...

Jul914 05:25 AM
symbolipoint

19 
4,837 