The co-terminal angles are 510 and -210 degrees
Here, we want to get the co-terminal angle of the given angle
Co-terminal angles can be obtained by subtracting or adding 2pi to the given angle
So firstly, we have to write the given angle in degrees
Mathematically;
[tex]\begin{gathered} \frac{5\pi}{6}\text{ = 150} \\ \text{add 360 = 150 + 360 = 510} \\ \text{subtract 360 = 150-360 = -210} \\ \end{gathered}[/tex]