Question

y=3cos(2x-pi)

Answer 1

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

Answer 2

i know to add pi/4 to get my x coordinates but hot do i get my y coordinates?

Answer 3

hot=how

Answer 4

The amplitude is 3 units, the period is pi. The phase shift is:
\[\large -\frac{\pi}{2}\]

Answer 5

agreed, c=(-),not +

Answer 6

wait the book says phase = pi/2

Answer 7

The book has taken the absolute value of the phase shift. The phase shift has not been considered as a vector.

Answer 8

ok, so how do i solve for the y coordinates?