How do you graph #y=-3cos(x+pi)#?
1 Answer
Oct 6, 2016
amplitude 3, horiz shift of
Explanation:
Pi is a 180 degree shift backwards. try it on a graphing calculator. graph{y = − 3 cos ( x + π ) [-5, 5, -2pi, 3pi]}
So if x = -pi, you are at 1*3 = 3, which is where the graph starts. It goes up to 3 and down to -3. No frequency change.
