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If f(0) = f'(0) = 0 and f''(x) = tan^(2)...

If `f(0) = f'(0) = 0` and `f''(x) = tan^(2)x` then f(x) is

A

`log|secx|-(1)/(2)x^(2)`

B

`logcosx+(1)/(2)x^(2)`

C

`log|secx|+(1)/(2)x^(2)`

D

`x^(4)+x^(3)+1`

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