Question: Say that X and Y are independent random variable, both with a pmf p(x)=2/3 for x= -1 and p(x) -1/3 for x=2. Define the random

Say that X and Y are independent random variable, both with a pmf p(x)=2/3 for x= -1 and p(x) -1/3 for x=2. Define the random process Z(t) =Y cost+X Sint. show that the process is weakly stationary but not stationary.

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