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(完整word版)三角函数练习题及答案.pdf

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1、第 1 页共 7 页三角函数一、选择题1已知为第三象限角，则2所在的象限是()A第一或第二象限B第二或第三象限C第一或第三象限D第二或第四象限2若 sin cos 0，则在()A第一、二象限B第一、三象限C第一、四象限D第二、四象限3sin34cos65tan34()A433B433C43D434已知 tan tan12，则 sin cos 等于()A2 B2C2D25已知 sin xcos x51(0 x)，则 tan x 的值等于()A43B34C43D346已知 sin sin，那么下列命题成立的是()A若，是第一象限角，则cos cos B若，是第二象限角，则tan tan C若，

2、是第三象限角，则cos cos D若，是第四象限角，则tan tan 7已知集合A|2k 32，kZ，B|4k 32，kZ，C|k 32，kZ，则这三个集合之间的关系为()AABCBBACCCABDBCA8已知 cos()1，sin 31，则 sin 的值是()A31B31C322D3229在(0，2)内，使 sin xcos x成立的 x 取值范围为()精品资料-欢迎下载-欢迎下载名师归纳-第 1 页，共 7 页 -第 2 页共 7 页A2，445，B，4C45，4D，423，4510把函数ysin x(xR)的图象上所有点向左平行移动3个单位长度，再把所得图象上所有点的横坐标缩短到原来

3、的21倍(纵坐标不变)，得到的图象所表示的函数是()Aysin32x，xRBysin62x，xRCysin32x，xRDysin322x，xR二、填空题11函数 f(x)sin2 x3 tan x 在区间34，上的最大值是12已知 sin 552，2，则 tan 13若 sin253，则 sin214若将函数 ytan4x(0)的图象向右平移6个单位长度后，与函数 ytan6x的图象重合，则的最小值为15已知函数f(x)21(sinxcosx)21|sinxcosx|，则 f(x)的值域是16关于函数f(x)4sin32x，xR，有下列命题：函数y=f(x)的表达式可改写为y=4cos62x

4、；函数y=f(x)是以 2为最小正周期的周期函数；函数 yf(x)的图象关于点(6，0)对称；函数 yf(x)的图象关于直线x6对称其中正确的是 _三、解答题17求函数 f(x)lgsin x1cos2x的定义域精品资料-欢迎下载-欢迎下载名师归纳-第 2 页，共 7 页 -文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F

5、8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8

6、I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V

7、6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T

8、9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2

9、H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z

10、6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U1

11、0T9F8X4第 3 页共 7 页18化简：(1)()()()()()(180coscos180tan360tansin180sin；(2)()()()(cossinsinsinnnnn(nZ)19求函数ysin62x的图象的对称中心和对称轴方程20(1)设函数 f(x)xaxsinsin(0 x)，如果 a0，函数 f(x)是否存在最大值和最小值，如果存在请写出最大(小)值；(2)已知 k0，求函数 ysin2 xk(cos x1)的最小值精品资料-欢迎下载-欢迎下载名师归纳-第 3 页，共 7 页 -文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档

12、编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B

13、9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2

14、 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4

15、文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z

16、6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7

17、H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8

18、X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4第 4 页共 7 页参考答案一、选择题1D 解析：2k 2k 23，kZk 22k 43，kZ2B 解析：sin cos 0，sin ，cos 同号当 sin 0，cos 0 时，在第一象限；当sin 0，cos 0 时，在第三象限3A 解析：原式3tan6cos3sin4334D 解析：tan tan1cossinsincoscossin12，

19、sin cos 21(sin cos )212sin cos 2sincos 2 5B 解析：由得 25cos2 x5cos x120解得 cos x54或53又 0 x，sin x0若 cos x54，则 sin xcos x51，cos x53，sin x54，tan x346D 解析：若，是第四象限角，且sin sin，如图，利用单位圆中的三角函数线确定，的终边，故选D7B 解析：这三个集合可以看作是由角32的终边每次分别旋转一周、两周和半周所得到的角的集合1cossin51cossin22xxxx(第 6 题)精品资料-欢迎下载-欢迎下载名师归纳-第 4 页，共 7 页 -文档编码:

20、CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 H

21、L4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI

22、4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编

23、码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9

24、 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2

25、ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文

26、档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4第 5 页共 7 页8B 解析：cos()1，2k，kZ2k sin sin(2k)sin()sin 319C 解析：作出在(0，2)区间上正弦和余弦函数的图象，解出两交点的横坐标4和45，由图象可得答案本题也可用单位圆来解10C 解析：第一步得到函数ysin3x的图象，

27、第二步得到函数y sin32x的图象二、填空题11415解析：f(x)sin2 x3tan x 在34，上是增函数，f(x)sin233 tan341512 2解析：由sin 552，2 cos 55，所以 tan 21353解析：sin253，即 cos 53，sin2cos531421解析：函数y tan4x(0)的图象向右平移6个单位长度后得到函数ytan46xtan64x的图象，则646 k(kZ)，6k21，又 0，所以当 k0 时，min2115221，解析：f(x)21(sinxcosx)21|sinxcosx|)()(xxxxxxcossin sin cossin cos精品资

28、料-欢迎下载-欢迎下载名师归纳-第 5 页，共 7 页 -文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6

29、R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9

30、F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H

31、8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6

32、V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10

33、T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB

34、2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4第 6 页共 7 页即f(x)等价于 minsin x，cos x，如图可知，f(x)maxf 422，f(x)minf()116解析：f(x)4sin32x4cos322x4cos62x4cos62x

35、 T22，最小正周期为令 2x3k，则当k0 时，x6，函数 f(x)关于点06，对称令 2x3k 2，当x6时，k21，与 kZ 矛盾正确三、解答题17 x|2k x2k 4，kZ 解析：为使函数有意义必须且只需01cos20sin xx先在 0，2)内考虑 x 的取值，在单位圆中，做出三角函数线由得 x(0，)，由得 x 0，4 47，2 二者的公共部分为x40，所以，函数f(x)的定义域为 x|2k x2k 4，kZ(第 15 题)(第 17 题)精品资料-欢迎下载-欢迎下载名师归纳-第 6 页，共 7 页 -文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10

36、T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB

37、2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4

38、Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U

39、10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:

40、CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 H

41、L4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI

42、4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4第 7 页共 7 页18(1)1；(2)cos2解析：(1)原式coscostan tan sin sin tan tan 1(2)当 n2k，kZ 时，原式)()()()(2cos2sin 2sin 2sin kkkkcos2当 n2k1，kZ 时，原式)()()()(12cos12sin 12sin 12sin kkkkcos

43、219对称中心坐标为0，122k；对称轴方程为x2k3(kZ)解析：ysin x 的对称中心是(k，0)，kZ，令 2x6k，得 x2k12 所求的对称中心坐标为0，122k，kZ又 ysin x 的图象的对称轴是xk 2，令 2x6k 2，得 x2k3 所求的对称轴方程为x2k3(kZ)20(1)有最小值无最大值，且最小值为1a；(2)0解析：(1)f(x)xaxsinsin 1xasin，由 0 x，得 0sin x1，又 a0，所以当 sin x1 时，f(x)取最小值1a；此函数没有最大值(2)1cos x1，k0，k(cos x1)0，又 sin2x0，当 cos x1，即 x 2k

44、(kZ)时，f(x)sin2 xk(cos x 1)有最小值f(x)min0精品资料-欢迎下载-欢迎下载名师归纳-第 7 页，共 7 页 -文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6

45、R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9

46、F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H

47、8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6

48、V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10

49、T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4文档编码:CB2H8I2Z6B9 HL4Z6V6R7H2 ZI4U10T9F8X4

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