3) f(x, y) = -9 sin x-5 cos y at (0, 5 (0,7) A) L(x, y) = 9x - 5y - C) L(x, y) = -9x - 5y - 5 B) L(x, y) = -9x + 5y - 2 D) L(x, y) = 9x + 5y - 5

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