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The tangents drawn from the origin to th...

The tangents drawn from the origin to the circle `x^2+y^2-2rx-2hy+h^2=0` are perpendicular if

A

`h=pm2r`

B

`h=pmr`

C

`r^2+h^2=1`

D

None of these

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The correct Answer is:
B
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PATHFINDER-CIRCLE-QUESTION BANK
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