已知sin θ+cos θ=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
,则sin θ-cos θ的值为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab5fd75e84490d62fff9625d34f3c030.png)
A.![]() | B.-![]() | C.![]() | D.-![]() |
更新时间:2018-11-06 22:10:23
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【知识点】 sinα±cosα和sinα·cosα的关系解读
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单选题
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适中
(0.65)
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解题方法
【推荐1】若
是
的一个内角,且
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce47439b3c7493cbd01aaf79ecc48907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d469f6556c10a448446ef4ef59065bc4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】已知
为第一象限角,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0edef5da91bf8639268238493015547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a2b8dae45cd30a752aedb1ca66c30a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐3】已知
,点
是边
上的一点,
,
,
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b030ff1967682591d1408f06ca71bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e414e19c139513d0dbac5d04493fd1a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2226a2be3c81caf8b82e60d79efded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b38a716fb0f2473507a4fa0ff91f60e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e9948de40419e6e536186f848e4f69.png)
A.![]() | B.![]() | C.4 | D.16 |
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