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Chapter 9: Q. 28 (page 747)
Graph the equations in Exercises 25–32 in the polar plane. Compare your graphs with the corresponding graphs in Exercises 17–24.
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Use Cartesian coordinates to express the equations for the parabolas determined by the conditions specified in Exercises 22–31.
Complete the definitions in Exercises.
Given two points in a plane, called _______, an ellipse is the set of points in the plane for which _______.
In Exercises 48–55 convert the equations given in rectangular coordinates to equations in polar coordinates.
Measurements indicate that Earth’s orbital eccentricity is and its semimajor axis is astronomical units.
(a) Write a Cartesian equation for Earth’s orbit.
(b) Give a polar coordinate equation for Earth’s orbit, assuming that the sun is the focus of the elliptical orbit.
In Exercises 24–31 find all polar coordinate representations for the point given in rectangular coordinates.
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