题目
题型:不详难度:来源:
(本小题满分12分)
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013317-47564.gif)
![]() | … | ![]() | 0 | ![]() | ![]() | ![]() | ![]() | … |
![]() | … | 0 | 1 | ![]() | 0 | ![]() | 0 | … |
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013319-48256.gif)
(2)若在△ABC中,AC=2,BC=3,
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013320-68866.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013320-22693.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013320-57397.gif)
(2)∵
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013320-53272.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013321-39209.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013321-52464.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013321-47737.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013321-72435.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013321-96481.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013322-50780.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013322-67940.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013322-73700.gif)
……………………………12分
解析
核心考点
试题【(本小题满分12分)已知函数的一系列对应值如表:…0……0100…(1)求的解析式;(2)若在△ABC中,AC=2,BC=3,(A为锐角),求△ABC的面积。】;主要考察你对正弦函数的图象与性质等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013307-64667.gif)
(1)将
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013307-68091.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013307-21948.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013307-68091.gif)
(2)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013307-74092.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013301-73886.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-54082.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-13612.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-54082.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-32682.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-13612.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-54082.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-13612.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-13612.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-54082.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-86903.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-54082.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-68014.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-13612.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-54082.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-86903.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-68014.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013303-43298.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013302-54082.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013303-68702.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013303-32421.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013251-31900.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013251-83375.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013251-68885.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013252-56780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013252-41028.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013251-31900.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
(本题满分14分
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013220-86192.gif)
已知向量
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013220-71487.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013220-58500.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013220-26182.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013221-64203.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013221-19263.gif)
(Ⅰ)若
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013221-79474.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013221-88902.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013221-12247.gif)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013222-54087.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013222-36690.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013222-43699.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013223-63248.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013222-43699.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013223-95869.gif)
(1)设方程f (x) – 1 = 0在(0,
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013214-56571.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013214-85542.gif)
(2)把函数y = f (x)的图象
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914013215-76022.gif)
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