Do you have a full solution? I really need help.

You are writing solution to a different problem

Is there a solution without inversion? I haven't learned it.

But I don't know what you mean by bc-inversion, since I have never studied inversion.

Is there a solution to problem 1 without inversion? I don't really know inversion, like is there an angle chasing solution? If so can you post a solution?

anyone?