An integrating factor for the differential equation \[(1+{{y}^{2}})dx-({{\tan }^{-1}}y-x)dy=0\] [MP PET 1993]

An integrating factor for the differential equation \[(1+{{y}^{2}})dx-

1.	An integrating factor for the differential equation \[(1+{{y}^{2}})dx-({{\tan }^{-1}}y-x)dy=0\] [MP PET 1993]
A.	\[{{\tan }^{-1}}y\]
B.	\[{{e}^{{{\tan }^{-1}}y}}\]
C.	\[\frac{1}{1+{{y}^{2}}}\]
D.	\[\frac{1}{x(1+{{y}^{2}})}\]
Answer» C. \[\frac{1}{1+{{y}^{2}}}\]

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An integrating factor for the differential equation \[(1+{{y}^{2}})dx-({{\tan }^{-1}}y-x)dy=0\] [MP PET 1993]

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