DEMOSTRAR
- 2cosx / cosx . tgx + senx = ctg

-secx - tgx = ctgx / csecx + 1

-(tg4x - ctg4x) cos2x . sen2x / tg2x + ctg2x = sen4x - cos4x


DEMOSTRAR 2cosx Cosx Tgx Senx Ctgsecx Tgx Ctgx Csecx 1tg4x Ctg4x Cos2x Sen2x Tg2x Ctg2x Sen4x Cos4x class=