I'm taking "pre-calculus" at the moment and haven't learned too much.
graph $\displaystyle y = x-\frac{1}{\tan{x}}$ in your calculator (make sure your calculator is in radian mode) and look for the zero(s) in the given interval.
graph $\displaystyle y = x-\frac{1}{\tan{x}}$ in your calculator (make sure your calculator is in radian mode) and look for the zero(s) in the given interval.