计算:
(1)tan
+tan
+
tan
tan
;
(2)(1+tan 21°)(1+tan 22°)(1+tan 23°)(1+tan 24°).
(1)tan
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e62204700edefb575a2105d13186e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1579686108b7c76b17a37e1a8bf23b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e62204700edefb575a2105d13186e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1579686108b7c76b17a37e1a8bf23b9.png)
(2)(1+tan 21°)(1+tan 22°)(1+tan 23°)(1+tan 24°).
21-22高一·全国·课前预习 查看更多[1]
(已下线)【导学案】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:2021-12-29 19:31:51
|
【知识点】 用和、差角的正切公式化简、求值解读
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解答题-证明题
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解题方法
【推荐1】(1)证明:
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解答题-问答题
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较易
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解题方法
【推荐2】已知角
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b95d47e0134efc07bd1626ee632517.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7b915277169254e670ea51b693b9fc.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96244e30981fa94bd12c7da86847d6f8.png)
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