Recent content by rekshaw

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    Simple trigonometry / geometry question. Diagram included

    Hey all, BACKGROUND: (please note that knowledge of this is not necessary): I'm currently writing a javascript application using vectors (with jquery and raphaeljs) that enables me to rotate custom text (using font.js file, not normal fonts). However, due to a bug in the new version of raphael...
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    Sequence monotonic homework problem help

    Bounded means, it will reach a point where it will stop increasing more and more quickly. For example, if you had just 1/x^2, it will get smaller and smaller and smaller until the increment is tiny and the sum of the sequence will end up converging to a number. your sequence is 4n + 1/n ...
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    Understanding Conditional Probability: Formulas and Logic Explained

    Hey! you mean P(A|B) right? P(A/B) could be mistaken for P(A\B) ..the difference. Anyways, the concept behind this definition (debatably an axiom), is very simple. Imagine a Venn Diagram with A and B as two circles crossing each other giving rise to a shared mid-section. P(A) = [outcomes...
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    Have I found a new math trick for multiplication?

    Cool, I still have to read the rest of it, I just wanted to let you know about this: EDIT: Ok I read all of it. Uhm...I never heard about the 10x-x method, and I tried doing one calculation with your method and one different calculation with the 10x-x method which you explained at the bottom...
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    Simple recurring sequence (1, 2, 1, 2, 1, 2, 1, 2, )

    Naturally! Thanks very much guys and sorry for the trivial question.
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    Simple recurring sequence (1, 2, 1, 2, 1, 2, 1, 2, )

    trivial yet my mind is blank, I'm wayyy overthinking this! Was just thinking of a simple sequence to test-drive on my calculator, and this one came up in my mind (the sequence terms, not the sequence itself...) I've been trying for the past hour to find a simbolic representation of a...
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    Optimization - gothic window

    I'm assuming your shape is like this? /\ |_| Since the top has to be an equilateral triangle you know that 3 segments have to be equal (if the base of the triangle counts as a segment). Then you have 3 segments left over to play with (the sides below the triangle and the base of the window)
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    Calculators TI-89 Titanium - Probability - Expected Value

    EDIT: I found the solution, it can be done using the TwoVar() function on the TI-89 and it gives you a whole lot more than just the expected value. thanks anyways
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    Swine Flu: Potential Threat to Human Species?

    I was watching the CNN couple of days ago and a spokesman was arguing that the epidemic is actually way to over-blown by the media and that even though it helps to keep everyone on such a high alert, it is really unnecessary as it is far from being really dangerous.
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    Physics Forums Logo distorted?

    Haha sorry guys! Its kind of like the FedEx logo, once you see the white arrow between the E and the x you will only look at that when you see it again!
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    Physics Forums Logo distorted?

    "Physics Forums" Logo...distorted? Now I love it, its simple, direct and goes nice with the style of the forum. But there is one thing bugging me about it: Or is it just me?
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    Understand Fields & Forces: 4 Formulas & 6 Motion Formulas

    Thank you so much! Finally its much clearer to me :) I really appreciate the time you took to explain all that!
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    Troubleshooting a DC Electric Motor

    Are you sure the batteries are fresh? Try changing batteries and see if the execution improves. I've had it happen to me once, the apparatus was all perfect and I set up everything according to instructions...then I found out the batteries were half dead.
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    Understand Fields & Forces: 4 Formulas & 6 Motion Formulas

    Thanks :D Now I got 2 down. So when there is a gravitational FORCE, we use an inverse SQUARE law. OK. Anyone got any other explanations for the other ones? I was told that the formulas were force, field, potential and energy...which is which? :S
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    Time as a Uni-Dimensional Force

    There is a fantastic video on youtube called Measuring the 11th Dimension or words to that effect (youtube is blocked here in china so I can't check..im an expat) but it defines time as our 4th dimension and states that our inability to measure it as any other dimension is due to the fact that...
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