What is the derivative of f(x) = cos(2x) - sin(3x) + tan(4x) at x = π/6?
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What is the sine of an angle in a right triangle if the opposite side measures 5 units, and the hypotenuse measures 13 units?
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Math question: "Graph the quadratic function y = -2x^2 + 3x + 1. Determine the vertex, axis of symmetry, and y-intercept. Also, find the x-intercepts, if any.