I really need help with this
![I really need help with this class=](https://us-static.z-dn.net/files/dac/83da03adff3eeca3cffb0b13ee38e55a.png)
Answer:
3 periods
Step-by-step explanation:
A period is a complete oscillation performed by the graph / wave particles.
From -2π to 0 is first period.
From 0 to 2π is the second period.
From 2π to 4π is the third period.
Hence, there are 3 periods.