Question

What is the frequency of `f(theta)= sin 18 t - cos 45 t`?

Answer 1

`2pi`

Explanation:

Frequency of sin (18t) --> `(2pi)/18`
Frequency of cos (45t) -->`(2pi/)45`
Frequency of f(t) is `2pi`
(least common multiple of (2pi)/18 and (2pi)/45)

(2pi)/18 .... X ..(18) -... -->`2pi`
(2pi)/45 .... x ..(45) ... --> `2pi`