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Any circle through the point of intersec...

Any circle through the point of intersection of the lines `x+sqrt(3)y=1` and `sqrt(3)x-y=2` intersects these lines at points `Pa n dQ` . Then the angle subtended by the arc `P Q` at its center is (a) `180^0` (b) `90^0` (c) `120^0` (d) depends on center and radius

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