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passes through a curve point (1,pi/4) an...

passes through a curve point `(1,pi/4)` and at some point Its gradation is given by `y/x-cos^2(y/x)` then equation of curve

A

`y=xtan^(-1)(In(e)/(x))`

B

`y=xtan^(-1)(In2)`

C

`y=(1)/(x)tan^(-1)(In(e)/(x))`

D

None of these

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The correct Answer is:
A
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