I got
5.53+2pi times n
WORK:
Solve for x
While -1 is a solution, it isn't within the interval of 0,2pi.
However, we can use the reference angle identity
So some more possible points are
Since it on a interval, it must be less than 2 pi or 6.28.
Let find some more points
So 5.28 is a point,
That is too big since -6.28 is smaller than 7.03
We can use the identity
1 is smaller than 2pi so it is true.
Negative 3/4 is smaller than zero so it not a solution.
Make sure to include
so
We can also -3/4 plus 2 pi.
Which is about 6
5.53.