Question: For the function f(x, y) = 4e -5x sin(y), find a unit tangent vector to the level curve at the point (5,-3) that has

For the function f(x, y) = 4e -5x sin(y), find a unit tangent vector to the level curve at the point (5,-3) that has a positive component. Present your answer with three decimal places of accuracy.

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