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

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Answer 1 · 2016-10-06T04:54:32

amplitude 3, horiz shift of $-pi$

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.

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