Let f (x) [[cos x ]], - x . (a) Sketch the graph of

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Let f (x) − [[cos x ]], -π ≤ x ≤ π.

(a) Sketch the graph of f.

(b) Evaluate each limit, if it exists.

(i)

lim f(x) х-


(ii)

lim f(x) x>(7/2)-


(iii)


(iv)


(c) For what values of a does limx→xaf(x) exist?

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