Hello every one,
it is about
I am a bit embarrased to ask this cause I can go deep for hours in a real calculus problem and enjoy it, but unfortunately is not the same for trigonometry.
I just hate it, I find it so uninteresting and boring. I have looked at some tutorials already.. I always try to do my best before I post but this.. I cannot handle trigonometry that easy... call it psychological what ever...
Once in a while some exercise is asking for it and here I am unable to proove this equality.
Thank you all!