"For which value of k does y=cos(k)(x) have a period of 2?"

I'm sure this is a relatively stupid question, I just need a clarification on this concept here..

So if someone could explain this to me, I'd appreciate it. Thanks.

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- Jun 7th 2010, 04:31 PMSavior_SelfProblem involving period of a sinusoid func.
"For which value of k does y=cos(k)(x) have a period of 2?"

I'm sure this is a relatively stupid question, I just need a clarification on this concept here..

So if someone could explain this to me, I'd appreciate it. Thanks. - Jun 7th 2010, 05:00 PMskeeter