# How do you find the amplitude and period of #f(t)= -2 cos(3t)#?

##### 1 Answer

Oct 24, 2015

Have a look at the numerical factors in your function:

#### Explanation:

The amplitude is given by the number

The period can be found using the

Graphically you can see these properties:

graph{-2cos(3x) [-11.25, 11.25, -5.63, 5.62]}