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Jun1-13 07:36 PM Fredrik

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General Math

- Math topics not applicable to the categories below. High-school Math
 Views: 8,631 Announcement: Two free ways to get Gold Membership! Jan17-12 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 09:23 AM micromass 1 32,527 can anyone advise me any way to convert this equation to s-domain by using laplace transform TQ... ... Apr11-09 11:11 AM yuri6996 2 726 just a (random) thought problem ive been trying to get my mind around... :p lets say we wish to grow a field of... Apr11-09 03:25 AM CompuChip 1 669 Question for Canadians really: I'm visiting some friends in Canada this summer and I was wondering if, while I'm... Apr10-09 11:51 PM whybother 6 1,087 Guys, I am in Calculus 2, but I still have trouble seeing the answer when u plug in a radian measure into a trig... Apr10-09 08:06 PM qntty 11 13,007 an idea i had: factorizing taylor polynomials Can any taylor polynomial be factorized into an infinite product... Apr10-09 04:18 PM rochfor1 2 853 Hi. So a classic logic puzzle goes like this: At noon the hour, minute, and second hands coincide. In about one... Apr10-09 03:45 PM Soca fo so 1 3,349 I've been looking around for this, but I cant find any discussion of non-integer moduli for use in modular arithmetic.... Apr10-09 06:05 AM matt grime 3 955 I'm really bad with trig identities, how do we show the following: Acosx+Bsinx=Ccos(x+a) Apr10-09 05:55 AM Georgepowell 6 4,074 Currently, my knowledge of mathematics includes topics through Calculus, Number Theory, and a bit of Linear Algebra. ... Apr9-09 12:25 PM science.girl 2 1,338 Hi all This is my first post so please be gentle with me! Limit of this rational function as x approaches... Apr9-09 11:55 AM CRGreathouse 10 3,334 This is probably a silly question to some, but I've been struggling to understand how the delta function behaves when... Apr8-09 05:24 PM yaychemistry 2 5,541 Hi everyone Could you give me a way to calculate the period of every trigonometric functions? thanks Apr8-09 02:42 PM AUMathTutor 4 18,086 Hi, for my research I need to calculate Pearson's correlation coefficient among more than two time series. I never... Apr8-09 01:50 PM jophysics 0 848 what are the x and y intercepts y= x+2/x-7 rational expression is y=-2/7 and x= -2 Apr8-09 12:14 PM HallsofIvy 7 1,082 First post here, although I could eyeball this project I have been stumped as to how it would be calculated. I... Apr8-09 12:08 PM HallsofIvy 1 1,221 Hey everybody, i am studying physics and i have just managed the first semester. I want to train my math skills a... Apr8-09 01:50 AM AniketSharma 9 1,082 I have a simple problem here, some confusion on my part. I've just started learning about functions and their... Apr7-09 06:19 PM HallsofIvy 5 1,916 Hello, could you help me with some true false questions about matrices? First If... Apr7-09 06:14 PM HallsofIvy 1 2,033 Hello All, I am working on a program that produces plots that use a logarithmic scale on the X-Axis (for showing... Apr7-09 04:58 PM Jdo300 7 4,633 In his famous (but unknown to me until recently) 1967 paper,* Richardson showed that the problem of deciding whether a... Apr6-09 11:03 PM CRGreathouse 1 911 Hi PF members! I'd like some guidance with the intuition behind the following problem. I have provided my intuition... Apr6-09 06:03 PM lifelearner 8 1,206 is it possible to reflect a linear relation using a non-linear relation as a mirror, I think i figured out how it... Apr6-09 02:35 PM cam875 0 493 Changed to a different question: Can anyone provide a proof for the order of alternating groups |An| = ½(n!)? Apr6-09 11:53 AM Gear300 4 2,631 Apologies if this has been asnswered before or if it's in the wrong place but I really don't know the proper terms I... Apr6-09 11:15 AM matt grime 3 1,392 Hi, I have \sum_{j=\kappa}^{\inf} \varphi^{2j-\kappa}\sigma^2 I know the answer is =... Apr6-09 05:39 AM slider142 3 1,118 In reading a book on astrodynamics I came across the following statement: \vec{a}\cdot \vec{\dot{a}}=a \dot{a} ... Apr6-09 01:18 AM Nabeshin 1 1,343 What theory are they? Set theory comes to mind but is that too broad? Apr5-09 09:02 PM n!kofeyn 2 1,007 Alternating groups apply to all even permutations in Sn for n > 2. Since n = 2 is inclusive, what got me wondering is... Apr5-09 02:58 PM jeffreydk 3 751 Hi The source coding theorem says that one needs at least N*H bits to encode a message of length N and entropy H.... Apr5-09 11:07 AM gop 4 854 There's an attachment in this post, that show my attempts. So how is it actually derived for a sinewave? And if... Apr5-09 09:36 AM derek e 24 2,905 I'm not sure I should be asking this question in Maths, but I think it is a maths question and I don't care about the... Apr5-09 06:39 AM Hurkyl 7 898 Hey guys! Say I have a date. Let's just take todays date 05/04/2009. And say I have numbers 0 - 6 corresponding... Apr5-09 02:54 AM MrGillig 5 953 i figured it out thx Apr5-09 12:23 AM PhysicsHelp12 1 869 The LinearAlgebraMatrixManipulation package is now obsolete with the new version of Mathematica. Say you had an... Apr4-09 05:07 PM Nusc 1 1,181 So I know that sine of an angle is the side opposite of the angle in a right triangle divided by the hypotenuse. What... Apr4-09 03:56 AM dx 8 5,052 Hi all. I found this "proof" and was just wondering if there is an error in it or not, because I couldn't find it. ... Apr3-09 09:31 PM spec138 3 711 Hey guys, My cousin came over and was talking about his geometry class and it got me to derive 2*Pi*r and Pi*r^2... Apr3-09 06:30 PM MrJB 1 1,784 So I was tutoring a friend who is in college algebra and we were working threw synthetic division of polynomials, and... Apr3-09 05:45 PM dipstik 8 2,117 How would I find values for A and B such that AB-A-B=1673 Where A and B are integers? I know the answer (28... Apr3-09 02:23 PM mistermath 17 2,434 I have a pretty general question about vectors. The scalar product of two vectors is a calculation of what exactly? ... Apr3-09 01:50 PM robphy 14 3,924