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    Ellipse Major Axis

    Result

    2 a

    Example plots

    Example plots

    Equations

    x(t) = a cos(t) y(t) = b sin(t)

    x^2/a^2 + y^2/b^2 = 1

    r(θ) = (a b)/sqrt((b^2 - a^2) cos^2(θ) + a^2)

    (for an ellipse with center at the origin, semimajor axis a parallel to the x-axis, and semiminor axis b parallel to the y-axis)

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