(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

arccos(cos2[tex]\Pi[/tex])

3. The attempt at a solution

cos of 2[tex]\Pi[/tex] =1

how do I get the arccos of 1? Without a calculator.

Thanks

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# Homework Help: Bit foggy on this trig question

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