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Questions  

 The solution of x+ydy/dxyxdy/dx=xsin2x2+y2y3 is given by 

a
−cotx2+y2=xy2+c
b
tanx2+y2=x2y2+c
c
cotx2+y2=xy+c
d
None of these

detailed solution

Correct option is A

x+ydydxy−xdydx=xsin2x2+y2y3 xdx+ydyydx−xdy=xsin2⁡x2+y2y3xdx+ydysin2⁡x2+y2=x(ydx−xdy)y3⇒d−cot⁡x2+y22=xydx−x2dyy3=xyydx−xdyy2⇒d−cot⁡x2+y2=2xydyx−xdyy2⇒d−cot⁡x2+y2=dxy2⇒−cot⁡x2+y2=xy2+c

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