Deriving polar equations for conies Modify Figure 10.55 to
Chapter 9, Problem 74E(choose chapter or problem)
Modify figure 10.55 to derive the polar equation of a conic section with a focus at the origin in the following three cases.
a. Vertical directrix at x = -d, where d > 0
b. Horizontal directrix at y = d, where d > 0
c. Horizontal directrix at y = -d, where d > 0
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