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Find the fundamental period of 1+sin^2 (3π/5)n.(a) 10/3(b) 5(c) 3π/5(d) None of the mentionedI had been asked this question by my school principal while I was bunking the class.The doubt is from Classification of Signals topic in chapter Signals and Spectra of Digital Communications

Answer» CORRECT option is (b) 5

The BEST I can explain: sin^2(3π/5)N = (1-cos(6π/5)n)/2 = 1/2-1/2cos(6π/5)n ; period = 6π/(5*2π) = k/N = 3/5 ; N=5.


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