What is the equation of an ellipse with center at (h, k), semi-major axis a, and semi-minor axis b?
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Math question: Find the maximum and minimum values of the function f(x) = 2x^3 - 3x^2 + 4x - 1 in the interval [0, 3].
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Question: In a right triangle, if the length of the hypotenuse is 10 cm and the adjacent side measures 6 cm, what is the value of the cosine of the angle between them?