Question

What is the frequency of `f(theta)= sin 2 t - cos 7 t`?

Answer 1

`2pi`

Explanation:

Frequency of sin 2t --> `(2pi)/2 = pi`
Frequency of cos (7y) --> `(2pi/7)`
Find least common multiple of `pi` and `(2pi)/7`
`pi` ... x (2) ...--> `2pi`
(2pi)/7 ... x (7) ... --> `2pi`
Frequency of f(t) = `2pi`