# What is the frequency of #f(t)= sin(4t) - cos(7t)#?

##### 1 Answer

Apr 23, 2017

#### Explanation:

Given:

Use this reference for Fundamental Frequency

Let

Using the fact that

The fundamental frequency is the greatest common divisor of the two frequencies:

Here is a graph:

graph{y = sin(4x) - cos(7x) [-10, 10, -5, 5]}

Please observe that it repeats every