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The period of f(x)=cos (2pi/3)x is ...?
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The period of f(x)=cos (2pi/3)x is ...?

User Lucaboni
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Well lets see. if you're being specific about the rigor, then the period means that cos(2Π÷3(x+α))=cos(2Π÷3(x))Therefore this gives 2π÷3α=2πso α = 3.
Hope this can help you
User Klaaz
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