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Show tha the tangents drawn from the ori...

Show tha the tangents drawn from the origin in to the circle `x^(2)+y^(2)-2ax-2by+a^(2)=0` are perpendicular if `a^(2)-b^(2)=0`.

A

`h=r+1`

B

`h=-r`

C

`r^(2)+h^(2)=1`

D

`r^(2)=h^(2)`

Text Solution

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The correct Answer is:
D
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