Tangents drawn from origin to the circle ${x^2} + {y^2} - 2ax - 2by + {b^2} = 0$ are perpendicular to each other, if
Tangents drawn from origin to the circle ${x^2} + {y^2} - 2ax - 2by + {b^2} = 0$ are perpendicular to each other, if
- A
$a - b = 1$
- B
$a + b = 1$
- C
${a^2} = {b^2}$
- D
${a^2} + {b^2} = 1$
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- [IIT 2002]
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