I am not a mathematician and the last time I used a formula complexer than sin(x) was during my university time about 10 years ago.
Recently I saw an interesting graph but I couldn't find its formula or even its name.
here is an almost representation of the graph.
every time the graph descends, it descends to the top of last peak (in y value).
I like to know
- Is this graph has a name?
- What is its equation?
I believe this does the trick: $$f(x) = \frac{2}{3 \pi} x + \cos{x}$$
It doesn't have any special names I'm aware of, though.