解题方法
1 . 求下列各式的值.
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3327c96a9263c8f41b6b6e3762442f84.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e8aaa1d3458d3f10751e7e8ddd9053.png)
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2 . 已知
,
,
,
.
(1)求tan α的值;
(2)求
的值;
(3)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4acdc56bfe46cfc96f1ab9a97c8782da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d63c534f2dbe6d6aff830c34c9e45a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1114e36df0cfd5b957b95a0518fa3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa08bfe6a0500b0d0f6198b28fcd388.png)
(1)求tan α的值;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a08a1ffade82fb4a26656af64da60ca5.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db796b223b35e52aa7b4114da8072f5.png)
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3 . 在平面直角坐标系中,以
为始边作两个锐角
,它们的终边分别与单位圆相交于A,B两点.已知点A,B的横坐标分别为
.
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d75442a901f013aeb5c52a7113ae9b9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a5f7c8897bcf877e19dabb3a4dc535.png)
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解题方法
4 . 已知C,D是两个小区的所在地,C,D到一条公路AB的垂直距离分别为
,
,A,B两地之间的距离为
.
(1)如图1所示,某移动公司将在A,B之间找一点M,在M处建造一个信号塔,使得M对C,D的张角与M对C,A的张角相等,试确定点M与点A之间的距离;
(2)如图2所示,某公交公司将在A,B之间找一点N,在N处建造一个公交站台,使得N对C,D两个小区的视角
最大,试确定点N与点A之间的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1042f1eedf35bca829e651fab10c9ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed757330ebc13869382834912b8f94f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2bd4f1b3a3f3e534c5c3b39266f1ac8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/12/d48b920e-a699-4001-8e3a-6fc179c7ef0d.png?resizew=366)
(1)如图1所示,某移动公司将在A,B之间找一点M,在M处建造一个信号塔,使得M对C,D的张角与M对C,A的张角相等,试确定点M与点A之间的距离;
(2)如图2所示,某公交公司将在A,B之间找一点N,在N处建造一个公交站台,使得N对C,D两个小区的视角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c378e2e427a45884e28fea4cce3def.png)
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5 . 计算:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a1e7f39aa379c3c2ef926e37cba050.png)
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6 . (1)已知
,
,求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a135466eb8ca64d002d0fad36176d1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/800daefc645007a93a0f504eb5579b0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c6a96b2ff7e31fc9118b2a6a5182425.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7b4bcc419a4afd2310a5210329c5d7.png)
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解题方法
7 . 是否存在锐角
,
,使得下列两个式子①
,②
同时成立?若存在,求出
,
的一个值;若不存在,说明理由.
![](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/8b8699ed862fb8a7793b94af79660dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b4afce3032262a2a422bab6e300885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
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解题方法
8 . 已知
,判断并证明以下4个结论中,哪两个是正确的.
①
;
②
;
③
;
④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ffefbfd8bf977a19fbbd87f72d3c178.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ee49d9772f4de9d4f7137039ce8910.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8863767ba0c97cd61ffbf31cf7a5f82c.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15167bac33da218cf404673aa1fe7db5.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6fa5a6fb7b34612c93093d49a32d0b.png)
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解题方法
9 . 已知
.
(1)求tan α的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787247cc09a3c2d030846702f4afc7fa.png)
(1)求tan α的值;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7ea5acdf7fc03062b53d7f356dc943.png)
您最近一年使用:0次
解题方法
10 . 已知
,
且
,
,求
的值及角
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67b7d1f62e4e5baedc2d6fde4fb193e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02b145ec9b1de1268099cc230c58b768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbbe204e963612fec73ebbb88ed8e014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d820184873d0b4080477b427ed445a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065b69ca6da0764f284b25a49763933c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db796b223b35e52aa7b4114da8072f5.png)
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