1.

If intsqrt(2+tan^(2)x)dx-ln tanx+sqrt(2+tan^(2)x)+f(x)+c, then f(x)=

Answer»

`SIN^(-1)((SINX)/(SQRT2))`
`cos^(-1)((sinx)/(sqrt2))`
`cos^(-1)((cosx)/(sqrt2))`
`sin^(-1)((cosx)/(sqrt2))`

Answer :A


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