# Question #b7743

$\frac{7 \pi}{9}$
You can always add or subtract $2 \pi$ to an angle in radians without changing its value.
If you add $2 \pi$ to $- \frac{11 \pi}{9}$, you get $\frac{7 \pi}{9}$, which is between $0$ and $2 \pi$ radians.