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1、名师精编优秀教案1.3.2三角函数的图象与性质（2）【学习目标】1、借助正、余弦函数的图像，说出正、余弦函数的图像性质；2、掌握正、余弦函数的图像性质，并会运用性质解决有关问题；【重点难点】正、余弦函数的图像与性质一、预习指导正弦函数与余弦函数的性质：（1）定义域：（2）值域：对于sinyx：当且仅当x时，maxy；当且仅当x时，miny；对于cosyx；当且仅当x时，maxy；当且仅当x时，miny。（3）周期性：正弦函数和余弦函数都是周期函数，并且周期都是。（4）奇偶性：sin()yx xR是，其图像关于对称，它的对称中心坐标是，对称轴方程是；cos()yx xR是，其图像关于对称，它的对
2、称中心坐标是，对称轴方程是。（5）单调性：sin()yx xR在每一个闭区间上，是单调增函数.在每一个闭区间上，是单调减函数.cos()yx xR名师精编优秀教案在每一个闭区间上，是单调增函数.在每一个闭区间上，是单调减函数.思考：正、余弦函数的图像的这些性质可以从单位圆中的三角函数线得出吗？二、典型例题例1、判断下列函数的奇偶性：（1）33()sin()42f xx(2)2()lg(sin1sin)f xxx(3)1sincos(),.1sinxxf xxRx例2、比较下列各组中两个三角函数值的大小：（1）sin 250、sin 260（2）15cos8、14cos9例 3、求函数sin(2
3、)3yx的单调增区间。思考：()fxsin(2)3yx的单调增区间怎样求呢？例 4、求下列函数的对称轴、对称中心：文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G
4、7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4
5、C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V
6、10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U
7、5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5
8、U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A
9、2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4文档编码:CC5U4C3F3X6 HJ9A2V10A7V2 ZC1K1U5G7E4名师精编优秀教案（1）2sin()33xy（2）1cos(3)126yx三、课堂练习1、判断下列函数的奇偶性：（1）()sincosf xxx（2）2
10、()lg(1 sinsin)f xxx（3）1cos2sin()1sinxxf xx2、下列函数的单调区间：（1）sin()4yx（2）3cos2xy3、函数2sin()63yxx的值域为4、比较下列各组中两个三角函数值的大小：（1）sin14、sin155（2）sin194、cos160四、拓展延伸求下列函数的值域：（1）sinsinyxx（2）2cos2sin2yxx（3）22sin3cos3yxx文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y
11、5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 H
12、E7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4
13、W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10
14、ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U
15、7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文
16、档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV
17、6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1名师精编优秀教案【课堂小结】文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P
18、1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:
19、CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H
20、3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10
21、 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5
22、C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D1
23、0 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1文档编码:CV6N5H3Y5M10 HE7G5C4W4D10 ZR1N8U7M5P1