SIN(x) / (COS(x) + 1) + (1 + COS(x)) / SIN(x)
SIN(x)2 / (SIN(x)·(COS(x) + 1)) + (1 + COS(x))2 / (SIN(x)·(COS(x) + 1))
(SIN(x)2 + (1 + COS(x))2) / (SIN(x)·(COS(x) + 1))
(SIN(x)2 + 1 + 2·COS(x) + COS(x)2) / (SIN(x)·(COS(x) + 1))
(2 + 2·COS(x)) / (SIN(x)·(COS(x) + 1))
2·(1 + COS(x)) / (SIN(x)·(COS(x) + 1))
2 / SIN(x)