Again I have to find the point of intersection of these two functions.
I know cos(2x) = cos(x)^2-sin(x)^2
But still: sin(x)=cos(x)^2-sin(x)^2, i have no idea how to solve that. I reached the point (1+sin(x))=tan(x)cos(x), but i don't get further. Anybody who can help to find the exact solution?