Question

What is the frequency of `f(theta)= sin t - cos 4 t`?

Answer 1

`2pi`

Explanation:

Period of sin t --> `2pi`
Period of cos (4t) --> `(2pi/4) = pi/2`
Period of f(t) -->`(2pi)` --> least common multiple of `(2pi)` and `(pi/2)`.