Show P^1 is homemorphic to S^1(adsbygoogle = window.adsbygoogle || []).push({});

I know I need to prove there is a function satisfying it's 1-1 ,onto,continuous,and the inverse of function is continuous.However, I can't find it.Please help!!

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# Homework Help: Show P^1 is homemorphic to S^1

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