1 . 已知向量
=
,
,若
⊥
,则
=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a40e800346de9669285f33860f46db0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5093d86733b45f2ac38fe472cb6dd5b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780805c1b6c50c9511ad1aab340aeb66.png)
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名校
2 . 若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56921522e4274da01975791ed5721c1.png)
,则
=________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56921522e4274da01975791ed5721c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7bef6ac0b86bf47c55beee947faeca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f798a9af75a091a8be0b71f2038260.png)
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3 . 计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5140110cd406d6069fe6cf9a19f4c66f.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5140110cd406d6069fe6cf9a19f4c66f.png)
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名校
4 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e454f4a9cdf0c3f9392bd38703428e0a.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e454f4a9cdf0c3f9392bd38703428e0a.png)
您最近一年使用:0次
解题方法
5 . 下列说法:
①扇形的周长为
,面积为
,则扇形的圆心角弧度数为
;
②函数
的最大值为
;
③若
是第三象限角,则
的值为0或-2;
④若
,则
与
的终边相同;
其中正确的是_________ .(写出所有正确答案)
①扇形的周长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b1fe1b971b780e443a9b13621611c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38309217f0970107f6f6e65a4c77bae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9521abf0ff814208c82cc6d3bf03acb.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cddeec2aca19a8f9b9f19c2aca44cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e7d8ca64211001b9b1e3630695e6ed4.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc597b4887651e79f55670147a8d36b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
其中正确的是
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