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Find the Z-transform of cos⁡ωn u(n).

Posted: Thu Jul 14, 2022 11:09 am
by answerhappygod
a) \(\frac{z(z+cos⁡ω)}{z^2-2z cos⁡ω+1}\)
b) \(\frac{z(z-cos⁡ω)}{z^2-2z cos⁡ω+1}\)
c) \(\frac{z(z-cos⁡ω)}{z^2+2z cos⁡ω+1}\)
d) \(\frac{z(z+cos⁡ω)}{z^2+2z cos⁡ω+1}\)