What is the length of an unknown side of a triangle, using the sine law, if the angle measures 30 degrees, the side opposite the angle has length 5, and the sine of another angle is 0.5?
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Question: What is the limit of (x^2 + x - 6)/(x^2 - 4x - 21) as x approaches 3?
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What is the circumference (C) of a circle with radius (r) 5 units?