Q.

dydx+2x tan(x-y)=1sin(x-y)=

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a

Aex2

b

Ae-x2

c

Ae-2x

d

Ae2x

answer is C.

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Detailed Solution

Take x-y=t

 1-dydx-dtdx dydx+2x tan (x-y)=1

 2x tan t=dtdx  2x dx=cos t dxsin t x2=log (sin t)+c  sin t=Aex2  sin(x-y)=Aex2

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