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# General Math

- Math topics not applicable to the categories below. High-school Math
 Meta Thread / Thread Starter Last Post Replies Views Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions... Feb23-13 10:23 AM micromass 1 31,017 Hi folks. I work as an AutoCAD drafter for a wastewater/water engineering company. I use a manual, the American Pipe... Feb4-09 10:26 AM dughug 0 1,084 Hi everybody! I kindly request your help. I have to compute functions like \frac{ \sin (r x) - r x \cos (r... Feb4-09 04:38 AM coccoinomane 4 4,014 Hi Everyone, Do there exist any explicit formula for Cos(x_1+x_2+...+x_n) as a sum of products of Sin(x_i) &... Feb4-09 04:06 AM NaturePaper 6 1,032 Do you foil or do you multiply x's togeather and 2's togeather Feb3-09 09:15 PM jgens 2 1,118 Can anyone guide me to some good books on discrete math for an engineering student? Our recommended book does not look... Feb3-09 01:07 PM Lacero 0 1,617 If you have a fraction, for example, \frac{1}{{1.0091532\times10^{-12}} + 1} Is there a simple way to convert it... Feb2-09 10:51 PM adriank 3 2,529 i can solve x^x but adding this new x just confuses me any help will do, X^x^x Feb2-09 09:06 PM djuiceholder 7 19,149 Hello, I'm playing with a set of quadratics x^2 + bx + c, where b is fixed, and c is allowed to be any integer image... Feb2-09 06:00 PM approx 29 3,067 What allows us to do the construction found in Cantor's diagonal argument? Is there an axiom we must adopt to allow... Feb2-09 02:29 PM CRGreathouse 5 1,118 Division by zero is undefined.....but why doesn't somebody just define it? Like they did with root (-1). Feb2-09 11:54 AM wsalem 14 1,246 For some surds inside of surds, they can be converted into a more simple form: \sqrt{a+b\sqrt{c}}=e+f\sqrt{g} ... Feb2-09 04:39 AM Mentallic 2 2,300 I am currently just running a normal 3D incompressible flow problem in COMSOL 3, and end up with the following error:... Feb2-09 12:19 AM akshayvohra 1 4,429 Hi! I was wondering about this topic. The following assumptions are made: - area is flat and about 70 miles wide... Feb1-09 12:20 PM Gdarnall 2 3,122 I was working on double integrals when I came across the equation: x^(3/2)=sin(x). There was no noticeable way to... Feb1-09 08:17 AM arildno 5 1,180 So, I've been fiddling around with a computer game (not the most productive use of my time, I know) and I've come... Jan31-09 11:04 PM DuncanM 6 2,148 That's what my Precal teacher said, and so far I agree with him (though that's not saying much as I've only been... Jan31-09 10:56 PM CRGreathouse 16 2,337 Even in my second semester of calc I have yet to see a situation where the extra step made any sense why is it... Jan31-09 10:15 PM waht 3 2,743 http://mathworld.wolfram.com/AdjointRepresentation.html if you follow the link, they compute the matrices for ad... Jan31-09 05:51 PM Dox 21 5,640 Is there a grand unified theory that is being researched in mathematics? Jan31-09 12:39 AM Werg22 1 742 Hi guys, I need to solve the following trigonometric equation. Some time ago I would have used Fortran with the... Jan30-09 11:23 PM Nopollution 0 748 Hey everyone, I'm in my first year of electrical engineering, so as you can guess I'm not really taking any serious... Jan30-09 12:35 PM Tac-Tics 10 2,116 Hi, Let's say I have $1000 in a bookmaker, and this bookmaker would only allow bets of$500 at a time, each betting... Jan30-09 12:27 PM h0dgey84bc 2 867 We all know that a lot of machinery goes into study the set of natural integers such as algebraic number theory and... Jan29-09 10:05 PM lurflurf 5 1,330 I'm looking for a program/application/applet that will plot for me intrinsic equations. I've posted this question a... Jan29-09 05:31 PM Fermat 0 773 This is closely related to the problem posed in http://www.physicsforums.com/showthread.php?t=287947, but stated in... Jan29-09 03:17 PM mXSCNT 0 745 1=2? -1=1? First: 1-1=0 2-2=0 1-1=2-2 1*(1-1)=2*(1-1) Jan29-09 02:08 PM kacete 2 579 "Let f is a polynomial from k, where k is a field. Suppose that x appears in f with positive degree. We view f as an... Jan29-09 10:13 AM NoDoubts 0 905 is there a way to determine (does not need to be exact) the number of digits in x! ? sorry if this is kind of... Jan28-09 10:58 PM soandos 6 804 Im doing A-level maths at the moment an its nowhere in the sylabus im just generally interested :D can anyone giv... Jan28-09 05:50 PM NoMoreExams 7 1,718 Are there any connection exist between Poisson bracket and Lax pairs except r matrix Jan28-09 02:58 PM doctormath 0 1,095 I have a question of Markov chains and I would like to help me: Is the same ergodic distribution that stationary... Jan28-09 08:21 AM rcuriel 0 1,153 My first post here, so please humor me. I have found no one in my life who can explain this to me: My question is... Jan26-09 05:19 AM Im_not_asian 2 960 Trying to figure out the relationship between c and the 1-power... (-1)n+1 · i/n = c-n Given that cn= (-1)n ·... Jan26-09 05:11 AM chaoseverlasting 1 1,187 I'm an ASE certified Technician specializing in Brakes and Four-wheel Alignments. I'm going to go for my cert. in... Jan25-09 07:33 PM ASEmech 3 2,779 I was wondering if anybody has any experience with Lie Symmetry Method for solving PDE and ODE's? I have heard that... Jan25-09 06:41 PM element4 1 2,968 I'm currently trying to gain as broad a mathematical base as possible, and here's what I've done: Foundational:... Jan25-09 03:30 PM qntty 9 1,083 Say we want to map elements from one infinite set into another. But there is no function or formula to which all... Jan25-09 11:13 AM adnan jahan 9 1,039 Hi All. Can somebody give me a sample matlab code for Newton-Raphson Method for Nonlinear 4x4 System of Equations.... Jan25-09 01:42 AM Moly 1 1,341 Hi All. I have an equation that i want to numerically find the root of by using Newton Raphson. However the... Jan25-09 01:41 AM Moly 2 3,384 Hi, I'm having trouble understanding some statements in this proof from my textbook: "Thus, 2 = s^2/t^2 and 2t^2 =... Jan24-09 11:35 PM NoMoreExams 4 1,422