Ex: Find the Polar Equation of a Circle With Center at the Origin

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This video explains how to determine the equation of a circle in rectangular form and polar form from the graph of a circle centered at the origin.
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This is great, but how do you find the polar equation when the circle's center is not at the origin? For example: (x-3)^2 + y^2 = 9.

gleekymagicalslayer
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bro you never mention how to find a polar equation when circle not at center. Bad vid.

squareboy
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Is it just r=6 becuase tan inverse y/x is just sin0/cos0 which is 0?

adriannafurbush