How can I show the function [itex]f:]-\frac{\pi}{2},\frac{\pi}{2}[ \rightarrow R[/itex] defined by [itex]f(x)=tan(x)[/itex] is surjective?(adsbygoogle = window.adsbygoogle || []).push({});

If the domain was a closed interval I could use the intermediate value theorem, but now?

Thank you.

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# How to show tanx is surjective?

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