The period of he function cos \(\frac{\pi }{4}\left( {t - 1} \right)\) – McqOptions

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1.	The period of he function cos \(\frac{\pi }{4}\left( {t - 1} \right)\) is
A.	\(\frac{1}{8}s\)
B.	8s
C.	4s
D.	\(\frac{1}{4}s\)
Answer» C. 4s

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