Question: Let f(x) = x - cos x. (a) Does the equation x - cos x = 0 have a solution between x = 0 and

Let f(x) = x - cos x.
(a) Does the equation x - cos x = 0 have a solution between x = 0 and x = π? How do you know?
(b) Find the equation of the tangent line at x = π/2.
(c) Where does the tangent line from part (b) intersect the x-axis?

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