What is the value of sine of angle A if the opposite side measures 5 units and the hypotenuse is 13 units?
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What is the standard deviation of a set of numbers: 10, 15, 20, 25, 30?
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Math question: For the cubic function f(x) = x^3, find the value of x at which the function attains its maximum or minimum value within the domain [-10,10].