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

Related questions
See all questions in Amplitude, Period and Frequency
Impact of this question
2614 views around the world
You can reuse this answer
Creative Commons License