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a) x(k) = coshw.k How did he get the value inside the line Step 2 la r(k) = coshw,k ewok te-wok coshw, k (Z) = Z(*.k) + Z(e-w*) Z – transform of a“ : | 1 Z(a") = 1-az-1 Z(a") = a ROC : |Z| > |a| X(2) = } ( +) () Z-ewo Z-e-wo because a = ewo in Z(ew.k) and a = e-Wo in Z(e-w.k аnd

a) x(k) = coshw.k How did he get the value inside the line Step 2 la r(k) = coshw,k ewok te-wok coshw, k (Z) = Z(*.k) + Z(e-w*) Z – transform of a“ : | 1 Z(a") = 1-az-1 Z(a") = a ROC : |Z| > |a| X(2) = } ( +) () Z-ewo Z-e-wo because a = ewo in Z(ew.k) and a = e-Wo in Z(e-w.k аnd

Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.6: Additional Trigonometric Graphs
Problem 78E
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a) x(k) = coshw.k How did he get the value inside the line Step 2 la r(k) = coshw,k ewok te-wok coshw, k (Z) = Z(*.k) + Z(e-w*) Z – transform of a“ : | 1 Z(a") = 1-az-1 Z(a") = a ROC : |Z| > |a| X(2) = } ( +) () Z-ewo Z-e-wo because a = ewo in Z(ew.k) and a = e-Wo in Z(e-w.k аnd
Transcribed Image Text:a) x(k) = coshw.k How did he get the value inside the line Step 2 la r(k) = coshw,k ewok te-wok coshw, k (Z) = Z(*.k) + Z(e-w*) Z – transform of a“ : | 1 Z(a") = 1-az-1 Z(a") = a ROC : |Z| > |a| X(2) = } ( +) () Z-ewo Z-e-wo because a = ewo in Z(ew.k) and a = e-Wo in Z(e-w.k аnd
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