Answer
See the graph.
Work Step by Step
The period of the function $y=cos(\frac{x}{50})$ is $p=100\pi$. Thus, we need sufficient x-range to include at least a few periods of the function as shown in the graph.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.