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Polar Equations and Graphs

Video Summary:

The Polar Coordinate System Based on A point called the pole, and A ray called the polar axis, usually drawn in the direction of the positive x-axis. The ordered pair P(r,  ) gives the polar coordinates of point P. Equations such as r = 3 sin , r = 2 + cos , or r = , are examples of polar equations where r and  are the variables. The simplest equation for many types of curves turns out to be a polar equation. Evaluate r in terms of  until a pattern appears. Technology Note When graphing in polar coordinates, make sure the calculator is in polar mode.

 


 
 

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