Question: Find the value of a missing angle in a right triangle if the ratio of the length of the opposite side to the length of the hypotenuse is 0.5. (
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Math question: What is the derivative of f(x) = ∫(from 1 to x^2) (2t - 5) dt?
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Find the roots of the cubic equation 2x^3 - 5x^2 + 3x - 1 = 0.