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Mathematics 7 Online
OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

jimthompson5910 (jim_thompson5910):

period of cos(Bx) is 2pi/B

jimthompson5910 (jim_thompson5910):

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

jimthompson5910 (jim_thompson5910):

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

jimthompson5910 (jim_thompson5910):

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

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