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				| 1. | What is the z-transform of the signal x(n)=an(sin 0n)u(n)?a) ( frac{az^{-1} sin omega_0}{1+2 az^{-1} cos omega_0+a^2 z^{-2}} ) | 
| A. | ( frac{az^{-1} sin omega_0}{1-2 az^{-1} cos omega_0- a^2 z^{-2}} ) | 
| B. | ( frac{(az)^{-1} cos omega_0}{1-2 az^{-1} cos omega_0+a^2 z^{-2}} ) | 
| C. | ( frac{az^{-1} sin omega_0}{1-2 az^{-1} cos omega_0+a^2 z^{-2}} ) | 
| Answer» E. | |