This is from Wikipedia: Let $Y$ have a uniform distribution $Y$ ~ $ U(0,2\pi]$ and define $ X_t = cos(t + Y )$ .
Then $ {X_t} $ is strictly stationary.
Could someone prove this for me ?
Cheers
2026-03-27 10:45:58.1774608358
Why is cos(t+Y) stationary
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