Since I suspect that both cases have a similar apoach I combine these two.
According to exercise-exams of my university is aproximately equal to and aproximately equal to
Yes, of course.
A double post is the dumbest thing you can do when you want an answer, it's annoying.
I edited my post right after posting the thread, I realy don't know how it's possible.
As far as I'm concerned this thread (not the other one) can be deleted.
Thanks for the answer in the other thread and apology to the mods for the unnessecary work.