已知
是方程
的两根,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48b749c5c57345436e59f0f1b582634f.png)
(1)求
;
(2)若
求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d400d0ee58eb69f7643b89ec9e1ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f4d740f6569ca6edff382eac13f1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48b749c5c57345436e59f0f1b582634f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275a190315b375cf65eeb2fc41053a61.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa57f215f112ef476a9d2245deca2001.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7d5ef3a3d9a03be91135fc426d57cc.png)
17-18高一下·湖北荆州·期中 查看更多[2]
湖北省荆州市沙市中学2017-2018学年高一下学期期中考试数学试题(已下线)【课时作业】第3课时 两角和与差的正弦、余弦、正切公式的应用-2021-2022学年高一数学《新教材同步精典导学案》(人教A版2019必修第一册)
更新时间:2018-04-25 17:55:46
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适中
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解题方法
【推荐1】已知
的内角A,B,C的对边分别为a,b,c,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37519a9bd4af4a510aaa82f0b33fa92e.png)
(1)求B;
(2)设b=2,求sinAsinC的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37519a9bd4af4a510aaa82f0b33fa92e.png)
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐2】设
,函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bed6050700d21e4617b948bef40437c.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3420267b615f36b00ed8a65dd6bf152f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】在
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.
(1)求
;
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca360f427f9332158fe3245c148e4d1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad4fd4871453331ca8f15aa0efc5a93d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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【推荐2】足球教练带领运动员对“带球射门”进行专项训练.如图,教练员指导运动员沿着与边路
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
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(2)过点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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