Graph the following function Show at least two cycles Use th

Graph the following function. Show at least two cycles. Use the graph to determine the domain and range of the function. y = 5 cos (1/5 x) Choose the correct graph of the function below. Use the graph to determine the domain of y = 5 cos (1/5 x).

Solution

when x=0
y=5 cos0
so, y=5*1=5
which is in graph C, so that is our graph

And from graph we can see that x can be anything,
So, domain is All Real values i.e. from (-infinity,infinity)