已知sinα+cosβ=,sinβ-cosα=,则sin(α-β)=_______________.

已知sinα+cosβ=,sinβ-cosα=,则sin(α-β)=_______________.

答案

思路解析:两个式子平方相加就可以得到答案.

答案:-

相关题目

We must do something to stop people from ______.  A. to throw litter about  
We must do something to stop people from ______.  A. to throw litter about       B. to throw litter into  C. throwing litter about       D. throwing litter into
如图所示,小车上有一支架ABC,其中杆AB与斜面垂直,杆BC与
如图所示,小车上有一支架ABC,其中杆AB与斜面垂直,杆BC与斜面平行,在BC的末端有一个质量为m的小球.小车由静止释放后沿倾角为α的光滑斜面下滑,
---Who were those people with the flags?   ---A group ______ itself the League
---Who were those people with the flags?   ---A group ______ itself the League of  Peace.    A. calls         B. calling      C. called      D. being called
关于产生感应电流的条件,下列说法正确的是A.只要闭合电
关于产生感应电流的条件,下列说法正确的是A.只要闭合电路内有磁通量,闭合电路中就有感应电流产生B.穿过螺线管的磁通量发生变化时,螺线管内
下图是人体细胞中两种重要有机物A和E的元素组成及相互关系
下图是人体细胞中两种重要有机物A和E的元素组成及相互关系图,请据图回答: (1)图中⑤所指元素为________。 (2)D初步水解的产物是________。 (3)E具有多
By the end of this year, we _____ 2000 English words. A. will learn   B. woul
By the end of this year, we _____ 2000 English words. A. will learn   B. would learn C. have learnedD. will have learned  
如图,椭圆=1(a>b>0)的上,下两个顶点为A,B,直线l:y=
如图,椭圆=1(a>b>0)的上,下两个顶点为A,B,直线l:y=-2,点P是椭圆上异于点A,B的任意一点,连接AP并延长交直线l于点N,连接PB并延长交直线l
若函数在上是增函数,则的取值范围是 ▲   
若函数在上是增函数,则的取值范围是 ▲   

最新题目