已知
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b59b859d40510297b84687bfb75e0b8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a388163cb40aeca41a5eeda905ac27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0325e2fb69321935b9493f2e14a9ff78.png)
12-13高一下·全国·阶段练习 查看更多[2]
更新时间:2016-12-02 05:11:08
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【知识点】 已知两角的正、余弦,求和、差角的正切解读
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(0.85)
解题方法
【推荐1】设直线
与直线
的夹角为
,求实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6229fbdb2c3609beb75bf79952bcdc1.png)
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较易
(0.85)
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【推荐2】已知
是第二象限角,且
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(1)求
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(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30a96a9ce4dfcca705d9fad7c6c09ca7.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f90c4754e6b6fc862d72943fb35569.png)
您最近一年使用:0次
解答题-问答题
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较易
(0.85)
【推荐3】已知
,
为锐角,
,
.
(1)求
的值.
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db73deb6fa502e49e3c873ef076fbc32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06b53fedb98cd48178cd1610321bcc46.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f90c4754e6b6fc862d72943fb35569.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bad3c1424841f905de42b18326f9acfa.png)
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