Recent content by Eight

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    Partial differentiation of cos (in vector calculus)

    I keep thinking it must be a mistake too, but if it is a mistake then it is deliberate, as it has been repeated in a number of places. And during lectures where we go through the notes it was never picked up on.
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    Linear Algebra Problem - Finding The Equation Of A Plane

    How did you obtain the vector? You have two planes, and in \Re^{3} their intersection will be a line. I just did this question by subtracting one of the equations from a multiple of the other, and eliminating x. This then leaves an equation in terms of y and z (let's say ay +bz = c). From...
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    Partial differentiation of cos (in vector calculus)

    Homework Statement So using standard spherical polar co-ordinates, my notes define a sphere as r(s,t) = aCos(s)Sin(t) i + aSin(s)Sin(t) j + aCos(t) k and the normal to the surface is given by the cross product of the two partial differentials: \partialr/\partials X \partialr/dt...
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    Proving the poisson distribution is normalized

    Yeah it's come up in my 2nd year Quantum module. Thanks for the link, I think I'd just forgotten that, curse of the double gap year. Makes sense now, thanks again.
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    How to Find C Coordinates if OA + BA + CA is Perpendicular to OB

    I agree, I think you may have written something wrong there. The easiest way is using the dot product, as (OA+OB+OC) . (OB) = 0, then you'd get two equations, one for each C co-ordinate, that'd be easy to solve. However I don't get the answer you say you were given.
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    Proving the poisson distribution is normalized

    SOLVED Homework Statement I am trying to prove that the poisson distribution is normalized, I think I've got an ok start but just having trouble with the next step. Homework Equations A counting experiment where the probability of observing n events (0≤n<∞) is given by...
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