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If y=(t a n^(-1)\ x)^2 , show that (x^2+...

If `y=(t a n^(-1)\ x)^2` , show that `(x^2+1)^2(d^2\ y)/(dx^2)+2x(x^2+1)(dy)/(dx)=2.`

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XII BOARD PREVIOUS YEAR PAPER ENGLISH-BOARD PAPER SOLUTIONS-All Questions
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