I’ve been stuck on this problem for a week. It’s for a solar funnel I’m working on (no, it’s not homework) I’m trying to workout an equation that solves theta given x and y.

The idea is to have the funnel as wide as possible (smallest theta) so sun hitting the very top of the funnel just enters the oven. Any help?

I think if x = y, theta should be 90 – 45 / 2

Update

The equation is:

http://www.youtube.com/watch?v=J06nOZES084

Here’s daddy stovetop playing the blues. Nice and slow, where the silence in between the notes is just as important as the notes themselves. Spain were masters of that. Spain are one of my favourite bands.

http://youtube.com/watch?v=rn8MWBVAMhE

It’s not party music, but if you have some sadness deep down that doesn’t want to come out, Spain will drag all the emotions out, you have a good cry, maybe, and feel much better after. Or if you just need to wind down…