If sqrt(1-x^(2)) + sqrt(1-y^(2))=a(x-y),...

If `sqrt(1-x^(2)) + sqrt(1-y^(2))=a(x-y)`, then show that `(dy)/(dx)= sqrt((1-y^(2))/(1-x^(2)))`

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The correct Answer is:

`sqrt((1-y^(2))/(1-x^(2)))`

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