What is the derivative of f(x) = 2sin(3x) + 5cos(2x) - 4tan(4x) at x = π/3?
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Find the exact value of cot(5π/4).
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What is the standard form equation of an ellipse with vertical major axis having center at (4, -3), a minor axis length of 6 units, and a major axis length of 10 units?