已知
为锐角,且
.
(1)化简
;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98f65db9e5ffdd9a0394c17f3107af04.png)
(1)化简
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794f2c6bd63355105d179d11306a9cae.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61a0fbd74662f71f268fa538ea0a518b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eacde1c42151734fdc60f3001b590de.png)
22-23高一上·云南红河·期末 查看更多[3]
更新时间:2023-06-20 10:30:32
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解答题-问答题
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【推荐1】已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1186990397145b5de2e2332602d386c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb1da44c4891bf4a47dd250b13aa4c0.png)
您最近一年使用:0次
解答题-问答题
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较易
(0.85)
名校
解题方法
【推荐2】(1)计算![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e63422e0a8f3916ded06dcd47dd3bfa.png)
(2)已知
均为锐角,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e63422e0a8f3916ded06dcd47dd3bfa.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7225fb0aafc903c79fbc4a5927a7489c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eacde1c42151734fdc60f3001b590de.png)
您最近一年使用:0次
解答题-问答题
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较易
(0.85)
【推荐2】(1)sin 390°+cos(-660°)+3tan 405°-cos 540°;
(2)sin
+tan π-2cos 0+tan
-sin
.
(2)sin
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/221ca5c8b8b5311112e08ee856ebeeaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b2dfd7c4a190b8dbbc56f2fcc2b2ce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1975a3ec9c7de46ab5e1e4d081c91bf4.png)
您最近一年使用:0次
解答题-问答题
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【推荐3】已知
是第三象限角,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d33658e09092e727b0035825036fc8d.png)
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d33658e09092e727b0035825036fc8d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc948ca3df5b2579c64dec350802941.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07ff71ac5b54728cbc42a347c3686505.png)
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解答题-计算题
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【推荐1】利用和(差)角公式,求下列各式的值:
(1)
;
(2)
;
(3)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de5dc2a631c3e0eede00a950f0383b6c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b35a2b4bdc6e92cc749a04d3a3b9231.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee7211849ed165890b43318b3a08831.png)
您最近一年使用:0次
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
,
且
,
.
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90a88fe41141b9400364cda7e8c3def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7113b70505abc452803a7af8077c6858.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc282dae4ac9132196ac5d13f63b901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a009ce821e3add1f56315dd54826307.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850dba25bf0f5f13541bf9b6ec12b84d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
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