332
punti
Livello 1
$ \frac{sin(\frac{α}{2})}{cos(\frac{α}{2})} + \frac{cos(\frac{α}{2})}{sin(\frac{α}{2})} = \frac{2}{sin(2(\frac{α}{2}))} $
$ \frac{sin^2(\frac{α}{2})+cos^2(\frac{α}{2})}{sin(\frac{α}{2})cos(\frac{α}{2})}= \frac{2}{2sin(\frac{α}{2})cos(\frac{α}{2})} $
$ \frac{1}{sin(\frac{α}{2})cos(\frac{α}{2})}= \frac{1}{sin(\frac{α}{2})cos(\frac{α}{2})} $ O.K.
21742
punti
Livello 6