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Mathematics 7 Online
OpenStudy (anonymous):

WILL REWARD!! Find the period and the amplitude of the periodic function. y=-5cos6x

jimthompson5910 (jim_thompson5910):

In general y = A*cos(Bx - C) + D has amplitude: |A| period: T = 2pi/B

OpenStudy (anonymous):

Amplitude is -5 and the Period is 1/3 am i correct?

OpenStudy (anonymous):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

notice how I said the amplitude is |A| and not just A

jimthompson5910 (jim_thompson5910):

also, in the period equation, there's a pi

OpenStudy (anonymous):

Okay so amplitude 5 and period is 1/3pi?

jimthompson5910 (jim_thompson5910):

or pi/3

jimthompson5910 (jim_thompson5910):

good

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