若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41c3e80b8b6cbda0bb69974ae2979100.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e7cf8e4de50d3b12db495571023116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41c3e80b8b6cbda0bb69974ae2979100.png)
2023高一上·全国·专题练习 查看更多[1]
(已下线)5.5.1两角和与差的正弦、余弦、正切公式(第2课时)(导学案)-【上好课】
更新时间:2023-12-21 19:18:03
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【推荐1】观察下列几个三角恒等式:
①
;
②
;
③
;
④
;
一般地,若
、
、
都有意义,你从这四个恒等式中猜想得到的一个结论为___________ .
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7857c21e675e3f4aae8844596d5e42b.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4300ef38ed20eeeaf287c387af649690.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f49f2b432442f0a73e9958fee1bb2ffd.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a0405a95f09db9ec0d203f02f33a1d9.png)
一般地,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f35152720e43c6403d43bef47c0377d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5ff741ddf4211f6f20b63220bc8893.png)
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【推荐2】已知函数
,若
,
为
的两个零点,则当
取得最小值时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c715b2fc510f4557fac1338f165d38.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f26765b493dcb0cb3ebe4f7ef74c3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec46880a7b1ac33ebe219870564912b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b840f0307b879a81273f452d000d1a4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c715b2fc510f4557fac1338f165d38.png)
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【推荐1】已知函数
为偶函数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46626b75bd7bc420bf32b66e3253b40b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b9ecb7d5b18ad584b0f8da08d193e3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46626b75bd7bc420bf32b66e3253b40b.png)
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【推荐2】已知
,
,则
的值是_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4311bcbba0a1c2f394f3ca9cbdf88441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82050534a714293b7844fea94b75d74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
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