Goose v Hendo v security?

[McRooster]

go the red and blacks (perth demons). i like them cos they suck and no one else likes them.  haha soo soo jealous of you rooster i will be sitting a maths test :(

anything like this LE...
The equation cos(ax)=0 has a closed form solution in terms of x

so does cos(ax)+cos(bx)=0

but I am sure that cos(ax)+cos(bx)+cos(cx)=0 does not

I first encountered this problem back in late 2003 and began working on it again but thought flower it I'm getting another beer! ;D