MathematicsMedium127×since 2002Q3057Let the locus of the midpoints of the chords of the circle x2+(y−1)2=1x^2+(y-1)^2=1x2+(y−1)2=1 drawn from the origin intersect the line x+y=1x+y=1x+y=1 at P\mathrm{P}P and Q\mathrm{Q}Q. Then, the length of PQ\mathrm{PQ}PQ is :A12\frac{1}{2}21B1C12\frac{1}{\sqrt{2}}21D2\sqrt{2}2Check answerSkip