Question: Find the functions (a) f g, (b) gf, (c) ff, and (d) gg and their domains. f(x) = sin x, g(x) = x 2 +

Find the functions (a) f° g, (b) g°f, (c) f°f, and (d) g°g  and their domains.

f(x) = sin x,          g(x) = x2 + 1

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