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Frequently asked questions (FAQs)
Question: Find the amplitude, period, and range of the cosine function f(x) = cos(x). How many complete cycles are there within the interval [0, 6π]? Identify all the x-intercepts of f(x).
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What is the length of side c in a triangle if side a is 5, side b is 7, and the included angle is 60 degrees?