What is the period and amplitude for y = 7cos (4pix-2)?

1 Answer
Gió
Jun 2, 2015

You can "read" these information from your function:
The Amplitude is 7 meaning that your cos oscilates between +7 and -7.
The Period can be found using the 4pi multiplying the x in the argument of cos as:
period=(2pi)/color(red)(4pi)=1/2

Graphically you can see these information plotting your function:
enter image source here

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