A clothing store sells shirts in two colors, red and blue. Out of 100 customers, if the probability of a customer buying a red shirt is 0.3, find the expected number of customers buying red shirts.
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Question: What is the period of the trigonometric function f(x) = 2sin(3x) + cos(4x) - tan(2x)?
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What is the value of the sine of an angle with a radian measure of π/4?