Extend the sketch of the graph of (x) = cos x + 1/2 x in Example 4
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Extend the sketch of the graph of ƒ(x) = cos x + 1/2 x in Example 4 to the interval [0, 5π].
Data From Example 4
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EXAMPLE 4 Investigate the behavior of f(x)= cos x + cosx + x over [0, 1], and sketch its graph.
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