Question

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

Answer 1

`2pi or 360^@`

Explanation:

The period of sin t is `2pi or 360^@`
The period of sin 7t is `2pi/7` or `360/7`
The period of cos 2t is `2pi/2 = pi or 180^@`
The common period of f(t) is the least multiple of the 2 periods
`360/7` and `180`. It is `2pi or 360^@`