mysql> SELECT TAN(1),TAN(0); +--------------------+--------+ | TAN(1) | TAN(0) | +--------------------+--------+ | 1.5574077246549023 | 0 | +--------------------+--------+ 1 row in set (0.03 sec)由运行结果可知,TAN(1) 的值为 1.5574077246549023,TAN(0) 的值为 0。
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