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1、名师精编优秀教案1.2.3 三角函数的诱导公式（2）【学习目标】1、能进一步运用诱导公式求出任意角的三角函数值2、能通过公式的运用，了解未知到已知、复杂到简单的转化过程3、进一步准确记忆并理解诱导公式，灵活运用诱导公式求值。口诀：奇变偶不变，符号看象限【重点难点】诱导公式的推导和应用【自主学习】1、复习四组诱导公式：函数名不变，符号看象限2、已知：,3tan求)2sin()cos(4)sin(3)cos(2的值1、若角的终边与角的终边关于直线y=x 对称（如图），（1）角与角的正弦函数与余弦函数值之间有何关系？（2）角与角有何关系？（3）由（1），（2）你能发现什么结论？yxP角 的终边角 的
2、终边MMPy=x当角的终边与角的终边关于y=x 对称时，与的关系为：_ 公式五（）：_;_;_.名师精编优秀教案思考：若角的终边与角的终边关于直线xy对称，你能得到什么结论？当角的终边与角的终边关于xy对称时，与的关系为：_ 公式六（）：_;_;_.思考：这六组公式可以用口诀“奇变偶不变，符号看象限”来记忆，如何理解这一口诀？【典型例题】例1、求证：cos23sin，sin23cos例2、化简：（1）0000800cos260sin440cos280sin21（2）)2cos()23sin()27cos()2sin()23sin()sin()3tan(例 3、已知3175cos，且90180，
3、求15cos文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5
4、P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3
5、V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5
6、P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3
7、V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5
8、P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3
9、V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3名师精编优秀教案【课堂练习】1、求证：sin23cos，cos23sin2、化简：0200020sin170cos160cos200sin21)1(（2）)tan()23cos()2sin(1)(tan123、已知31)75cos(0，是第三象限角，求)105sin()105cos(00的值4、判断函数)23cos()23sin(1cossin)
10、(44xxxxxf的奇偶性5、求值：90sin89sin3sin2sin1sin22222【课堂小结】文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C
11、1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9
12、ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C
13、1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9
14、ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C
15、1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9
16、ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3名师精编优秀教案文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文
17、档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J
18、6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文
19、档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J
20、6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文
21、档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3文档编码:CH1C1I8Y5P3 HX1J6B8G3N9 ZT9Q3V3E8L3