6 The two random processes X(t) and Y(t) are defined as X(t) = A cos (@n t) + B sin (@o f) Y(t) = B cos (@n t)- A sin (@o t) where. A and B are random variablės, wn is a constant. Show that, X(t) and...

Extracted text: 6 The two random processes X(t) and Y(t) are defined as X(t) = A cos (@n t) + B sin (@o f) Y(t) = B cos (@n t)- A sin (@o t) where. A and B are random variablės, wn is a constant. Show that, X(t) and Y(t) are jointly wide-sense stationary. Assume that A and B are uncorrelated, zero-mean random variables with same variance irrespective of their density functions.