Question

What is the frequency of `f(theta)= sin 4 t - cos 12 t`?

Answer 1

`pi/2 or 90^@`

Explanation:

The period of sin t is `2pi or 360^@.`
The period of sin 4t is `(2pi)/4 = pi/2` or `90^@`
The period of cos t is `2pi or 369^@`
The period of cos 12t is `(2pi)/12 = pi/6` or `30^@`
The period of f(t) is `pi/2 or 90^@`, the least multiple of `pi/2 and pi/6.`