已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd8723c71bba6fe68f052060ea2c8c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/179795a9798ca3073d2e4484d2ddad9d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-07-16 03:44:41
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解题方法
【推荐1】在平面直角坐标系
中,角
的顶点是原点O,始边是x轴的非负半轴,
,
是角
终边上一点,则
( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】下列关系式中正确的是( )
A.sin21°<cos20°<sin158° | B.sin21°<sin158°<cos20° |
C.sin158°<cos20°<sin21° | D.sin158°<sin21°<cos20° |
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【推荐2】要得到函数
的图象,只需将
的图象( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec68cac198a45e4ad150b6cd9d0c5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c191fdfd08fb94ba6ed45c71f0fbeb.png)
A.向左平移![]() | B.向右平移![]() |
C.向左平移![]() | D.向右平移![]() |
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【推荐1】已知
的内角A,B,C的对边分别为a,b,c,
,且
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
A.![]() | B.![]() | C.3 | D.![]() |
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【推荐2】已知锐角
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所对边分别为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐1】骑自行车是一种能有效改善心肺功能的耐力性有氧运动,深受大众喜爱,如图是某一自行车的平面结构示意图,已知图中的圆
(前轮),圆
(后轮)的直径均为2,
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【推荐2】已知实数
,
,
满足
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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