橢圓的軌跡(2)
Author: 藍邦偉　老師

橢圓的軌跡(2)

試求與(x-2)²+y²=1外切且與x²+y²=49內切的圓心軌跡

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顯示橢圓

顯示P點軌跡

α = 0 rad (slider from 0 to 6.283185307179586, step 0.003490658503988659)
A = Point(xAxis)
P: (1 + 4 * cos(α), sqrt(15) * sin(α))
f = Circle(P, Segment[A, P] - 1)
Q = Intersect(d, f, 1)
u = Vector((x(Corner[1]), 0), (x(Corner[3]), 0))
v = Vector((0, y(Corner[1])), (0, y(Corner[3])))
n = 1 (slider from 1 to 2, step 1)
Q_2: 0.2 * Corner[2] + 0.8 * Corner[1]
Q_3: (x(Q_2), y(Corner[4]))
poly1, a, q_2, q_3, b = Polygon(Corner[1], Q_2, Q_3, Corner[4])
g = Segment(Q_2, Q_3)
R: P
h = false
i = false