kenneyfamily
What is the period of y = 5 cos x?
What is the period of y= cos 5x



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kenneyfamily
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@jim_thompson5910 ..could you please help me with this last one?

jim_thompson5910
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period of cos(Bx) is 2pi/B

jim_thompson5910
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first case, B = 1
second case, B = 5

jim_thompson5910
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so period of 5*cos(x) is 2pi/1 = 2pi

jim_thompson5910
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the period of cos(5x) is 2pi/5