The polar equation of the circle with centre $\left(2, \frac{\pi}{2}\right)$ and radius 3 units is :

The polar equation of the circle with centre $\left(2, \frac{\pi}{2}\right)$ and radius 3 units is :
  1. $r^2+4 r \cos \theta=5$
  2. $r^2+4 r \sin \theta=5$
  3. $r^2-4 r \sin \theta=5$
  4. $r^2-4 r \cos \theta=5$

Solution

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Asked in: AP EAMCET 2006

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