What is the value of sin(45°) + cos(30°) divided by tan(60°) minus sec(90°)?
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Find the derivative of f(x) = 5sin(2x)cos^2(x) - 3tan(x)sec^3(x) using differentiation rules.
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What is the length of the segment formed by the intersection of an angle bisector with the opposite side, given that the angle measures 50 degrees and the opposite side is 8.6 cm long?