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9. Determine if the signal x(t)=cos2t+cos2t is periodic and calculate its period A. Periodic with a period (1) B. Periodic with a period () C.

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9. Determine if the signal x(t)=cos2t+cos2t is periodic and calculate its period A. Periodic with a period (1) B. Periodic with a period () C. Periodic with a period (1) D. None of all above 10. Characterize the power and energy of the following signal x(t)=Acos(3t),t0. A is positive integer constant number A. Finite power and energy B. Finite power and infinite energy C. Infinite power and energy D. Finite power and infinite energy ( 2 mark)

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