What is the frequency of the function f(x) = cos (12x)?

Question

What is the frequency of the function f(x) = cos (12x)?

Answer 1

The frequency is the inverse of the period.

For f(x) = cos(bx), the period is 2π/b.

 

For f(x) = cos(12x) the period is π/6, the frequency is 6/π.