1.

`x(dy)/(dx)-y+xsin(y/x)=0`

Answer» Correct Answer - `xtan(y/(2x))=C`
`(dy)/(dx)=y/x-sin(y/x)=f(y/x)`.
`int(" cosec "vdv)=int1/xdx rArr log(log v)=logx + log C`
`therefore log v =Cx = v=e^(Cx) rArr y=xe^(Cx)`.


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