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If the straight line represented by x co...

If the straight line represented by x cos `alpha` + y sin `alpha` = p intersect the circle `x^2+y^2=a^2` at the points A and B , then show that the equation of the circle with AB as diameter is `(x^2+y^2-a^2)-2p(xcos alpha+y sin alpha-p)=0`

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