What is the frequency of the function f(x)?
f(x)=2cos(x)−4
give your answer, in simplest fraction form,
f(x) = 2cos (x) - 4
We have the form
f(x) = Acos [ Bx ] + C
Note that
B = 1 = 2pi / period
This implies that the period must be 2pi
The frequency = 1 /period = 1 / [ 2 pi ]
+491 
