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    Tangent of a Circle

    Result

    T^^(t) = (-sin(t), cos(t))

    Plot

    Plot

    Equations

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

    x^2 + y^2 = a^2

    r(θ) = a

    (for a circle with center at the origin and radius a)

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