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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(lne/x)`

B

`y =xtan^-1(ln+2)`

C

`y=1/xtan^-1(lne/x)`

D

none

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The correct Answer is:
A
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MOTION-DIFFERENTIAL EQUATION -Exercise 2
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  14. Solution of the equation (1 - x^2) dy + xy dx = xy^2dx is

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