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What is the integral of the following ex...

What is the integral of the following expression?
`frac{1}{x^2 cos^2(frac{1}{x})`

A

`− tan ? + A`, where A is a constant.

B

`-tan frac{1}{2}-B`, where B is a consant

C

`frac{1}{2} tanx+C`,where C is a constant.

D

`sec frac{1}{x} tan frac{1}{x}` - D, where D is a constant

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