Question 564783
Find the amplitude, period and displacement of the function below and use this information to sketch its graph 
y=cos(2x+2pi/3) 
amp=1
period=pi
displacement=-2pi/6 = -(1/3)pi
-----
You have all the information you need.
---
Start the peak of the cosine curve x = -(1/3)pi.
The y-intercept is at (0,cos((2/3)pi) = (0, -1/2)
continue the curve to the right and to the left
remembering that the period is pi.
==================
{{{graph(400,400,-6,6,-2,2,cos(2x+(2/3)pi))}}}
===================
Cheers,
Stan H.