DOUBLE cos(DOUBLE x) Returns the cosine of x, where x is in radians
mysql> select cos(1); +---------------------+ | cos(1.0) | +---------------------+ | 0.54030230586813977 | +---------------------+ mysql> select cos(0); +----------+ | cos(0.0) | +----------+ | 1 | +----------+ mysql> select cos(Pi()); +-----------+ | cos(pi()) | +-----------+ | -1 | +-----------+
COS