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## Homework Statement

[itex]\int\stackrel{tan(8)}{tan(1)}\frac{dx}{x^{2}+1}[/itex]

## Homework Equations

## The Attempt at a Solution

[itex]\int\stackrel{tan(8)}{tan(1)}\frac{dx}{x^{2}+1}[/itex]

[itex]tan^{-1}x|\stackrel{tan(8)}{tan(1)}[/itex]

[itex]tan^{-1}(tan(8))-tan^{-1}(tan(1))[/itex]

[itex]8-1=7[/itex]

I'm fine with this, but my instructor said "Hint: The answer isn't 7."

What did I do wrong here?

As a side note, is there a better way to type a def. integral in LaTeX?

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