Question

What is the frequency of `f(theta)= sin 3 t - cos 5t`?

Answer 1

`2pi`

Explanation:

Period of sin 3t --> `(2pi)/3`
Period of cos 5t --> `(2pi)/5`
Least multiple of `(2/3) and (2/5)` --> 2
Common period of f(t) --> `2pi`
Check:
2pi/3 x 3 --> 2pi
2pi/5 x 5 --> 2pi