Periodicity of $\cos(2n + \theta)$

I have to calculate periodicity of e^j(2n + π/4)

If cos2n is Aperiodic then what is the periodicity of cos(2n + π/4) ? Please explain in steps for beginner!

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– Max
Apr 12 '19 at 10:18
• so are you saying that $\cos 2n$ is "aperiodic" or "a periodic"? Apr 12 '19 at 10:54
• Cos2n is aperiodic! Apr 12 '19 at 11:12
• What is the meaning of aperiodic? The cosine function is periodic with $T=2\pi$.
– user41664
Apr 12 '19 at 14:46
• @KrishnaKumarS Changing the phase of an aperiodic signal cannot turn it into periodic.
– MBaz
Apr 12 '19 at 17:35