Question

state the amplitude and period and phase shift of the function y=-3cos(3x+3pi/2)

Answer 1

http://www.wmueller.com/precalculus/families/1_71.html
this will show you how to find all 3
very simple process

Answer 2

hmm ok

Answer 3

still confused though :(

Answer 4

the amplitude of this function is the number in front of cos
its always positive
its 3
the period is 2pi/(the number with x)
2pi/3
the phase shift is the number after x
the function was moved left 3pi/2

Answer 5

amp=3
period 2pi/3
phase shift= 3pi/2

that right? @etemplin

Answer 6

yes, except phase shift should be either negative or specified "to the left"

Answer 7

THANKS!

Answer 8

@etemplin so for the function y=3sin(3x/2-pi/4)...the amp is 3, period is 3pi/2 and phase shift pi/4?

Answer 9

@etemplin