Question

Sketch the function for the interval. State the periodicity of the model

Answer 1

Step-by-step explanation:

The function is given below as

`y=4cos(18x)`

To sketch the graph, we will have the image below at the interval

`0\leq x\leq40`

The periodicity of the model will be calculated below as

`\begin{gathered} 18=(2\pi)/(B) \\ B=(2\pi)/(18) \\ B=(\pi)/(9) \\ B=(180)/(9) \\ B=20^0 \end{gathered}`

Hence,

The periodicity is

`20^0`