What is the frequency of the function f(x)?
f(x) = 3 cos (π x) -2
express the answer in fracton form
In the form f(x) = Acos (Bx) + D
B = pi = the number of periods in 2pi
So
B = 2pi / period
pi = 2pi / period rearrange as
period = 2pi / pi = 2
And the frequency = 1 /period = 1/2
+511 
