f (x) = 2 cos x (a) Find the zeros of f on the interval [-2, 4]. (b) Graph f(x) = 2 cosx on the

f (x) = 2 cos x

(a) Find the zeros of f on the interval [-2π, 4π]. 

(b) Graph f(x) = 2 cosx on the interval [-2π, 4π]. 

(c) Solve f(x) = -√3 on the interval [-2π, 4π]. What points are on the graph of f? Label these points on the graph drawn in part (b). 

(d) Use the graph drawn in part (b) along with the results of part (c) to determine the values of x such that f(x) < -√3 on the interval [-2π, 4π].