What is the resultant vector when a vector of magnitude 5, at an angle of 30 degrees north of east, is added to a vector of magnitude 3, at an angle of 45 degrees south of east?
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What is the area of a regular hexagon with a side length 's'?
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What is the derivative of tan(x) + sec(x) - csc(x) across the interval [0, π/4]?