What is the period of the function f(x) = 2sin(3x) + cos(2x) in radians?
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What is the average number of pets owned by 20 students in a class if the data shows that 5 students own no pets, 7 students own 1 pet, 4 students own 2 pets, and 4 students own 3 pets?
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What is the limit as x approaches 0 of (1 - cos(x))^2 / x^2 using L'Hospital's Rule?