**8 Polar Coordinates**

**Chapter Contents**

**8.1** The Polar Coordinate System

**8.3** Conic Sections in Polar Coordinates

8.1 The Polar Coordinate System

INTRODUCTION So far we have used the rectangular coordinate system to specify a point *P* in the plane. We can regard this system as a grid of horizontal and vertical lines. The coordinates (*a*, *b*) of a point *P* are determined by the intersection of two lines: one line *x* = *a* is perpendicular to the horizontal reference ...

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