Recent content by alpha25

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    Undergrad Changing Center of Ellipse in Polar Coordinates

    Yes thanks...but I need it in polar coordinates
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    Undergrad Changing Center of Ellipse in Polar Coordinates

    Hi, does exist an easy way to change the center of circle or a ellipse in polar coordinates? thanks!
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    Graduate Solve Diferential Equation: d2u/(dθ)^2+u=0 → u=cos(θ-θ0)

    D is imaginary?
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    Graduate Solve Diferential Equation: d2u/(dθ)^2+u=0 → u=cos(θ-θ0)

    I already differentiate it twice and then I replace it to the equation and I get to zero, I know that cos(θ-θ0) is a solution, but I don t know how to get that solution. When I solve the equation I reach other result more complicated with imaginary terms etc...
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    Graduate Solve Diferential Equation: d2u/(dθ)^2+u=0 → u=cos(θ-θ0)

    Yes, thanks, but how can I get that result
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    Graduate Solve Diferential Equation: d2u/(dθ)^2+u=0 → u=cos(θ-θ0)

    How can I demostrate that a solution of d2u/(dθ)^2+u=0 is u=cos(θ-θ0) Thanks
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    Undergrad Integral of (dx)^2: Answers Here

    I know that KCos(x-x0) is a solution of d2y/(dx)^2+y=0 but I don t know how to demostrate it!
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    Undergrad Integral of (dx)^2: Answers Here

    In fact i am trying to resolve a a diferencial equation d2y/(dx)^2+y=0 I don´t know how to demostrate that a possibly answer is KCos(x-x0)
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    Undergrad Integral of (dx)^2: Answers Here

    Hello, does anyone knows the Integral of (dx)^2 Excuse my english, I hope I had make myself clear, thanks