Question: Find the linear approximation of the function f(x, y) = 1 - xy cos y at (1, 1) and use it to approximate f(1.02, 0.97).

Find the linear approximation of the function f(x, y) = 1 - xy cos πy at (1, 1) and use it to approximate f(1.02, 0.97). Illustrate by graphing f and the tangent plane.

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