Write a math question for the characteristics of the cosine function f(x) = cos x: How many times does the graph of f(x) = cos x intersect the x-axis between 0 and 4π?
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What is the value of sin^2(45°) + cos^2(45°) on the unit circle chart?
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What is the logarithmic function that passes through the points (1, 4) and (2, 8)?