Answer :
To find co-terminal angles, add or subtract 2π. Make sure the denominator is the same as the original problem.
5π/7
+ 14π/7
19π/7
5π/7
- 14π/7
-9π/7
a
5π/7
+ 14π/7
19π/7
5π/7
- 14π/7
-9π/7
a
