Question: What is the maximum value of the cosine function f(x) = cos x in the interval [0, 2π]?
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Math Question: In a triangle, if one angle measures 30 degrees, the side opposite that angle is 5, and the side adjacent to it is 10, find the length of the third side.
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What is the value of sin(45°) + cos(30°) / tan(60°) * sec(120°)?