Question: Find the period and amplitude of the sine function f(x) = sin(x). (
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What is the limit as x approaches 1 of (3x^2 - 5x + 2) / (2x - 1)?
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Math question: In triangle ABC, if the angle bisector of angle A intersects the side BC at point D, and the length of BD is 5 cm, what is the length of DC?