Question

What is the frequency of `f(theta)= sin 3 t - cos 1 8 t`?

Answer 1

`2pi`

Explanation:

Frequency of sin (3t) --> `(2pi)/3`
Frequency of cos (18t) --> `(2pi)/18 = pi/9`
Find least common multiple of `(2pi)/3 and pi/9`

`(2pi)/3` ....x (3) ... --> `2pi`
`pi/9` .... x (18) ...--> `2pi`
Frequency of f(t) --> `2pi`