I have been working on a problem I have sort of worked myself into, and don't really know how to solve it.

I end up at

k = sin x / (1- cos x)

and I need to solve for x.

I cant find any identities that will make this easier, and I don't really remember how to break it up any further (as I am an engineer, not a mathematician)

I can plug it into a calculator and solve for a given value, and that works well enough for what I am doing. However, I would like to further solve it, to make using it easier in the future.

Anyway you could aide me would be greatly appreciated.