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解题方法
1 . 若角
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5a448771c3381e220a954b749a1425.png)
________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a7de5b70003502e40b95b3b7d3d933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5a448771c3381e220a954b749a1425.png)
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解题方法
2 . 已知扇形的半径为
,弧长为
,若其周长为
,当该扇形面积最大时,其圆心角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b147632ceec8c5c6ed5fdea4a454521e.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b147632ceec8c5c6ed5fdea4a454521e.png)
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3 . (1)化简:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f696f91bf8b7a3038daab3618004ea4.png)
(2)证明恒等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f696f91bf8b7a3038daab3618004ea4.png)
(2)证明恒等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8afb2698a20b56a98f5cda272b31ff.png)
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4 . 若点
关于
轴对称点为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f8b5132f5657620c47c9ac7d5e31e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c88f2303ce4ea7c0cc10c6159dea18f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
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5 . 已知
为第二象限角,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b1e6929729f58afccce99b3ae8fe9c5.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32eb02421d867d06df9628e7a4850f7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b1e6929729f58afccce99b3ae8fe9c5.png)
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6 . 质点P和Q在以坐标原点O为圆心,半径为1的
上逆时针作匀速圆周运动,同时出发.P的角速度大小为
,起点为
与x轴正半轴的交点;Q的角速度大小为
,起点为射线
与
的交点.则当点
与
重合时,点
的坐标不可能是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d99ef937823db2d4d3b1ae5af609eb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059b7530c506efb568b487fb191ec080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3ea342d5ebfdfa1e0048a7738d59163.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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7 . 函数
的奇偶性是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b2bd491259c62bf4cf8fc68c616431d.png)
A.奇函数 | B.偶函数 | C.非奇非偶函数 | D.既是奇函数又是偶函数 |
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8 . 化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3307cb992d14f87819e176f207f1b7.png)
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9 . 已知
,则
可用k表示为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d137598364451e46ad303a5419f7f446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b7ce1514d2892b0ed7a2b32bf4c1a9.png)
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10 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ed3a4726ff34772249467fa5e5239a.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f8604d0b409cc51484ca7ce7d99cbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ed3a4726ff34772249467fa5e5239a.png)
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