sprawdz tożsamości: a)(sin alpha +cos alpha )^{2} + (sin apha -cos alpha )^2=2 b)(tg alpha-1)(ctg alpha+1)=tg alpha-ctg alpha c)1+ctg a;pha = sin apha +cos apa : sin alpha

sprawdz tożsamości: a)(sin alpha +cos alpha )^{2} + (sin apha -cos alpha )^2=2 b)(tg alpha-1)(ctg alpha+1)=tg alpha-ctg alpha c)1+ctg a;pha = sin apha +cos apa : sin alpha