Pc9 4 polar&rect2 notes
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A linear equation in polar coordinates can be written in the form r = d, where d is the distance from the origin to the line. This represents a line through the origin since all points on the line will be the same distance r from the origin. Examples of polar equations for common lines are given such as lines through the origin like r=1 (the unit circle), and r=2 (circle of radius 2 centered at the origin).
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