How do you graph #y=-3cos(x+pi)#?

1 Answer
Oct 6, 2016

Answer:

amplitude 3, horiz shift of #-pi#

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.