Which of the following graphs is an accurate
representation of f(x)=-1/4cosx?
The graph of f(x)=-1/4cos x has a period of
2π and an amplitude of 1/4.
The range of this graph is [-1/4,1/4] and
f(0)=-1/4cos(0)=-1/4 so the graph starts at (0, -1/4).