Question: Let g(x, y) = cos(x + 2y). (a) Evaluate g(2, -1). (b) Find the domain of g. (c) Find the range of g.

Let g(x, y) = cos(x + 2y).
(a) Evaluate g(2, -1).
(b) Find the domain of g.
(c) Find the range of g.

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