Answer:
The period is 20.
Step-by-step explanation:
The period of the given sinusoidal function refers to the length of the interval, over which the function completes one full cycle.
From the graph it can be observed that, the graph completes one full cycle on the interval.
[tex][-10,10][/tex].
The period is
[tex]T=|10--10=|10+10|=|20|=20|[/tex]
