Math question: Find the derivative of f(x) = sin(x^2) + 2cos(3x) + tan(4x) at x = π/4. (
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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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Math Question: Simplify the expression √(108) - √(72) + √(50) - √(18)