If f(x)="cos"(tan^(-1)x), then the value...

If `f(x)="cos"(tan^(-1)x),` then the value of the integral `int_0^1xf^(x)dx"i s"` `(3-sqrt(2))/2` (b) `(3+sqrt(2))/2` 1 (d) `1-3/(2sqrt(2))`

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