Is sin (n) the periodic signals ?

[dickchen]

Sin is not a periodic sigbal.
If x is a periodic signal,x=x(n+T),T must be a real integer.
Now given sin=sin(n+T),hence T=2*pi,is not a real integer,so sin is not a periodic signal.

 

[ajdhingra]

no it's not periodic
for checking periodicity of digital signals
check omega/2/pi it should be in the form of M/N
where M and N are integer.
so in this case omega is 1 hence 1/2/pi doesn't qualify the criteria