Question: Do the graphs of the function have any horizontal tangents in the interval 0 x 2? If so, where? If not, why not?

Do the graphs of the function have any horizontal tangents in the interval 0 ≤ x ≤ 2π? If so, where? If not, why not? Visualize your findings by graphing the functions with a grapher.

y = x + 2 cos x

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