Question

Which of the following is the graph of f(x) = 5 cos (2x)?

graph with points 0, 5 and pi over 4, 0 and pi over 2, negative 5 and 3 pi over 4, 0 and pi, 5

graph with points at 0, 0 and pi over 4, negative 3 and pi over 2, 0 and 3 pi over 4, 3 and pi, 0

graph with points 0, negative 5 and pi over 4, 0 and pi over 2, 5 and 3 pi over 4, 0 and pi, negative 5

graph with points at 0, 5 and pi over 4, 2 and pi over 2, negative 1 and 3 pi over 4, 2 and pi, 5

Answer 1

The answer was the graph that had (0,5) and (pi/2, -5)....I just took the quiz. :)
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If you look at ramit.dour's graph, it shows the similar points as well. Ty!

Answer 2

@malice thanks that was right :)

Answer 3

:) @pink.1d