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三角恒等变换4教案(积化和差和差化积)

  • 2026-11-08 18:04:51
三角恒等变换4教案(积化和差和差化积)

两节课，主要是公式的推导和记忆。

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三角恒等变换3教案(求值求角)

基本 文件 流程 错误 SQL 调试
  1. 请求信息 : 2026-11-09 01:43:30 HTTP/1.1 GET : http://a.sjds.net/a/459690.html
  2. 运行时间 : 0.083836s [ 吞吐率：11.93req/s ] 内存消耗：4,579.04kb 文件加载：140
  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=cf09bb66b28494c6b38a4f80d1ff45fa
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  1. CONNECT:[ UseTime:0.000837s ] mysql:host=172.18.0.4;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001068s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000492s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000378s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000726s ]
  6. SELECT * FROM `set` [ RunTime:0.000366s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000789s ]
  8. SELECT * FROM `article` WHERE `id` = 459690 LIMIT 1 [ RunTime:0.000400s ]
  9. UPDATE `article` SET `lasttime` = 1794159810 WHERE `id` = 459690 [ RunTime:0.001231s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000291s ]
  11. SELECT * FROM `article` WHERE `id` < 459690 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000381s ]
  12. SELECT * FROM `article` WHERE `id` > 459690 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000416s ]
  13. SELECT * FROM `article` WHERE `id` < 459690 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000749s ]
  14. SELECT * FROM `article` WHERE `id` < 459690 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000676s ]
  15. SELECT * FROM `article` WHERE `id` < 459690 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000636s ]
0.094775s