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If sin^(-1)((x^2-y^2)/(x^2+y^2)) = tan^(...

If `sin^(-1)((x^2-y^2)/(x^2+y^2)) = tan^(-1)a`, then the value of `dy/dx` is (i)`x/y` (ii)`-x/y` (iii)`y/x` (iv) `-y/x`

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