Math Question: In triangle ABC, angle A is bisected by a line segment that intersects BC at point D. If angle A measures 50 degrees, and angle B measures 80 degrees, find the measure of angle BCD.
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What is the result of adding vector A (7i - 4j) to vector B (-3i + 2j)?
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What is the domain of the function f(x) = 2sin(3x) - cos(2x)?