Math question: In a circle, if an angle at the circumference is half the size of the angle at the center, what is the measure of the central angle in degrees?
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Math question: Determine the limit as x approaches infinity of (4x^2 + 3x - 5)/(6x^2 + 2x + 1).
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What is the result of adding vector 𝐴 with magnitude 8 and vector 𝐵 with magnitude 6, given that their directions make a 60-degree angle?