1.

The solution of (dy)/(dx)+ (xy)/(1 + x^(2)) = (1)/(x (1 + x^(2))) is

Answer»

`ysqrt(1+x^(2)) = sec^(-1)x+c`
`ysqrt(1+x^(2)) = -"cosec" H^(-1) x+c`
`ysqrt(1+x^(2)) = sin^(-1)x+c`
`ysqrt(1-x^(2)) = Tan^(-1)x+c`

Answer :B


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