What is the sine of an angle in a right triangle if the length of the side opposite to that angle is 10 units, and the length of the hypotenuse is 15 units?
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Question: In how many ways can you arrange 5 books on a shelf if 2 of them must always be together?
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What is the limit of (x^2 + x - 6)/(x - 2) as x approaches 2?