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Radius of the circle x^2+y^2+2x costheta...

Radius of the circle `x^2+y^2+2x costheta+2y s intheta-8=0` is 1 2. 3 3. `2sqrt(3)` 4. `sqrt(10)` 5. 2

A

1

B

3

C

`2sqrt3`

D

`sqrt10`

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The correct Answer is:
B
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