(adsbygoogle = window.adsbygoogle || []).push({}); Evaluate cos(arccos((32pi)/3))

From my understanding, I need to subtract (32pi)/3 by pi until the answer falls within the domain of [-1, 1]. Is this the correct way to solve this problem?

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# Evaluate cos(arccos((32pi)/3)) (I think I know how, just need someone to confirm)

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