was not quite sure how 2 solve sin((Pi*x)/3)=0 and while looking at the answer it gave 3j and j where r the j's from
regards Flowergirl5
$\displaystyle \sin{\frac{\pi x}{3}} = 0$
$\displaystyle \frac{\pi x}{3} = \arcsin{0}$
$\displaystyle \frac{\pi x}{3} = \pi n$, where $\displaystyle n$ is an integer representing the number of times you have gone around the unit circle...
$\displaystyle \pi x = 3\pi n$
$\displaystyle x = 3n$.
In this case, they have just used $\displaystyle j$ where I have used $\displaystyle n$.