## anonymous one year ago $\sec^2 (\pi/7) + \sec^2 (3\pi/7) + \sec^2(5\pi/7)$

1. anonymous

@rational

2. anonymous

@amistre64

3. anonymous

I was thinking of making a cubic just for the sake for it.

4. anonymous

$= \sec^2(2\pi/7) + \sec^2(4\pi / 7) + \sec^2 (6\pi/7)$Seems better this way.

5. anonymous

Yeah, I think I can make a cubic now...