Pre Cal.
posted by Madalyn on .
State the amplitude, period, and phase shift of the function y=3cos(3x+ (3pi/2))
Amplitude: 3
Period: 2pi/3
Phase Shift: pi/2
Am I right?

yes
Although I would personally like to see it written as
y = 3cos 3(x + pi/2)
that way the phase shift sort of hits you in the face.