Question: In Exercises 19 and 20, use a graphing utility to graph f, g, and y = x in the same viewing window to verify geometrically

In Exercises 19 and 20, use a graphing utility to graph f, g, and y = x in the same viewing window to verify geometrically that g is the inverse function of f. (Be sure to restrict the domain of f properly.)
1. f (x) = cos x, g(x) = arccos x
2. f (x) = tan x, g(x) = arctan x

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