Answer:
![\theta=(n\pi)/(5)](https://img.qammunity.org/2021/formulas/mathematics/college/o5f1xu4dyts61ynpljpkkm68da5i0l5tft.png)
Explanation:
You have the following function:
(1)
In order to find the zeros of the function you equal to zero the equation (1), and then you solve for θ:
![2sin5\theta=0\\\\sin5\theta=0\\\\5\theta=sin^(-1)(0)=n\pi;\ \ \ \ n=0,1,2,3,..\\\\\theta=(n\pi)/(5)](https://img.qammunity.org/2021/formulas/mathematics/college/65ynblvt6ohex34y2m83ly2aqh5wfifnnn.png)
Then, there are infinite zeros for the function of the equation (1), because n has infinite positive integers values.