Question

What is the frequency of `f(theta)= sin 18 t - cos 32 t`?

Answer 1

`pi`

Explanation:

Frequency of `sin (18t) --> (2pi)/18 = pi/9`
Frequency of `cos (32t) --> (2pi)/32 = pi/16`
Find least common multiple of `pi/9 and pi/16`
Frequency of `f(t) --> pi`