I must find the roots of the following equation : and graph them.
My attempt : and (I don't trust the implication here) and I don't reach anything.
Another attempt : (easy to graph).
I notice that in my both attempts.
So what are the roots? I didn't know an equation could have roots!
So the roots are .
As a check, note that .
If you take the polar approach, then you should note that
where n is an integer
n = 0: .
n = 1: .
Therefore the two roots are: