Question

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

Answer 1

`1/(2pi)`

Explanation:

Period of sin t --> `2pi`
Period of cos (3t) --> `(2pi)/3`
Period of f(t) --> `2pi`
`2pi` is the least common multiple of `2pi` and `(2pi)/3`
Frequency=1/period=`1/(2pi)`