Question

HELP PLEASE: Consider the functions
f(x) = 2 cos x
g(x) = − cos 2x
Which statement best describes the relationship between the graphs of f(x) and g(x)?

Answer 1

1. The period of f is larger than the period
of g.

Answer 2

3. The periods of f and g are the same.

Answer 3

4. The period of f is smaller than the period
of g.

Answer 4

Frequency of g is greater than f, hence its period is lower than f.