标签：cot blog pre style -- div nbsp 3.2 select
COT(x) 用于返回 x 的余切
mysql> SELECT COT(0.3), 1/TAN(0.3), COT(PI()/4); +--------------------+--------------------+--------------------+ | COT(0.3) | 1/TAN(0.3) | COT(PI()/4) | +--------------------+--------------------+--------------------+ | 3.2327281437658275 | 3.2327281437658275 | 1.0000000000000002 | +--------------------+--------------------+--------------------+
标签：cot blog pre style -- div nbsp 3.2 select
原文地址：http://www.cnblogs.com/pzk7788/p/6891931.html
