y = a sin b(x±h) ± k
a : amplitude - take absolute value
k : mid. line or vertical shift (+ up, - down)
period = 2π/b
h : horizontal shift (phase shift). (+ left, - right)
b : angular frequency
The correct answer to this question is B. 2 units down. This is the vertical displacement of the basic graph to produce a graph of y=-2-cos(x-pi).
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