Question 873769
Using degrees, find the amplitude and period of each function. Then graph. 
Y= 2cos(3(x+120)+2
***
equation for cos function: y=Acos(Bx-C)+D, A=amplitude, period=360/B
Y= 2cos(3x+360)+2
amplitude=2
B=3
period=360/B=120˚

see graph below: (x-axis scale in radians)
{{{ graph( 300, 300, -1, 4, -1, 10, 2cos(3x+360)+2) }}}