I was looking for some help on how to start this problem. I know that we must use the Mean-Value Theorem on |sin x| to get an f '(c). But I'm having a difficult time getting an initial start past that. Any hints and tips would be most useful. I also figure that we can let f(x) = |sin x| and g(x) = |x|.(adsbygoogle = window.adsbygoogle || []).push({});

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# Prove |sin x|/|x| =< 1 for all x in Real Numbers.

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