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Questions  

 The solution of sinxy(ydxxdy)=xy3(xdy+ydx) is 

a
xy2+sinxy+c=0
b
xy22+sinxy+c=0
c
xy22+cosxy+c=0
d
xy+tanxy+c=0

detailed solution

Correct option is C

Given differential equation issin⁡xy(ydx−xdy)=xy3(xdy+ydx)⇒sin⁡xyydx−xdyy2=xy(xdy+ydx)⇒d−cos⁡xy=12d(xy)2⇒−cos⁡xy=12(xy)2⇒−cos⁡xy=12(xy)2+c⇒xy22+cosxy+c=0

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