Answer:
![3\pi \rightarrow y=2\cos (2x)/(3)\\ \\(2\pi )/(3)\rightarrow y=6\sin 3x\\ \\(\pi )/(3)\rightarrow y=-3\tan 3x\\ \\10\pi \rightarrow y=-(2)/(3)\sec (x)/(5)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/dhzalzs4vvnqlygm1kksm602ri6ygwd105.png)
Explanation:
The period of the functions
,
,
or
can be calculated as
![T=(2\pi)/(b)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/gz81304j2wmziihdyvxgkx4a1ldbvnte04.png)
The period of the functions
or
can be calculated as
![T=(\pi)/(b)](https://img.qammunity.org/2020/formulas/mathematics/high-school/asasgcb5boon37jh9e96bteg73ut3ueb1y.png)
A. The period of the function
is
![T=(\pi)/(3)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/f4w6nyy6s6v7dsl0ql8arx3b2f0z9su42b.png)
B. The period of the function
is
![T=(2\pi)/(3)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/a52jd8ex6rjsyk04tokh1iw4x46ksmyceo.png)
C. The period of the function
is
![T=(\pi)/((1)/(4))=4\pi](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ahyquvwr813eejnxstecun5m3rhsjw43e6.png)
D. The period of the function
is
![T=(2\pi)/((2)/(3))=3\pi](https://img.qammunity.org/2020/formulas/mathematics/middle-school/esw0v7qr935f31ygfx3mvrkiofu3xjffq3.png)
E. The period of the function
is
![T=(2\pi)/((1)/(5))=10\pi](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ohlxa2yztxxdfmjahykkevy2eqarzc803i.png)