The probability density function p (x) = {1 / 2 cos (1 / 2) x, 0

As shown in the picture, if not clear, please ask. Please evaluate in time

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1. Let the distribution function of random variable X be: (1) the value of coefficient a; (2) the probability density function of X Re & nbsp; Uploaded
2. The probability density of random variable x is f (x) = {A / radical (1-x ^ 2) | x | = 1 question, a =? Answer = 1 / π... How to calculate P{-1/2
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9. What is the minimum positive period of y = (SiNx cosx) ^ 2-1?
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11. Let x ~ n (0,1) be a random variable, y = the x power of E, and find the probability density function of Y,
12. Suppose that the random variables X and y are independent of each other and obey the normal distribution n (0, σ ^ 2), and calculate the probability density of Z = (x ^ 2 + y ^ 2) ^ 0.5
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15. Let two-dimensional random variables (x, y) in the region D = {(x, y) x > = 0, Y > = 0, x + y
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17. The random variables (x, y) are uniformly distributed over the region D, where d = (0
18. Let the probability density function of random variable X be f (x) = {X / 2,0
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