题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025207-11059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025207-82359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025208-88306.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025208-16726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025208-76428.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025208-33543.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025209-19491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025209-20305.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025209-78634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025209-38646.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025210-92694.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025210-48291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025210-54584.png)
解析
试题分析:(1)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025210-84736.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025211-67292.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025211-68924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025211-77755.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025211-51975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025212-65956.png)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025212-53146.png)
OC=3,
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025212-51879.png)
由勾股定理,可得
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025212-87679.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025213-70470.png)
点评:此题是对圆的考察,会把弦,弧,圆心角结合到一起;在直角三角形中运用勾股定理。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025147-78680.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025140-23747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025141-89235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025141-57253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025141-69646.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025141-11081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025142-53769.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025141-57253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025142-55164.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025142-29670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025142-56374.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025136-78436.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025137-26072.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025131-99919.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025131-98373.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025131-67376.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025132-68778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025131-99919.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025131-99919.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025132-35242.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025126-45589.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025126-32188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025126-50365.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025126-77627.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025126-90523.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025126-19019.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025127-91121.png)
(1)求弦
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105025127-46180.png)
(2)求图中阴影部分的面积.
最新试题
- 1甲,乙两人连续7年调查某县养鸡业的情况,提供了两方面的信息图(如图)。甲调查表明:养鸡场的平均产鸡数从第1年的1万只上升
- 2下列各式中计算结果是x2-6x+5的是( )A.(x-2)(x-3)B.(x-6)(x+1)C.(x-1)(x-5)D
- 3新疆瓜果特别甜的原因是[ ]A.热量充足,光照强B.昼夜温差大C.海拔高,云量少D.水源充足
- 4管仲夷吾者,颍上人也。少时常与鲍叔牙游,鲍叔知其贤。管仲贫困,常欺鲍叔,鲍叔终善遇之,不以为言。已而鲍叔事齐公子小白,管
- 5随着重庆经济建设的蓬勃发展,2011年,重庆市民用于美容、休闲、旅游、学习、进修、时尚等方面的消费大幅度提高。这表明(
- 6阅读理解,填表。 It"s a fine Sunday morning. Ann and her mother
- 7下列四字词语中书写完全正确的一项是A.穿流不息 唠唠叨叨 含糊其辞B.吹毛求庇 喋喋不休 慢条斯理C.唇焦口燥 推心置腹
- 8计算(12分)①已知②③
- 9(1)如图①∵∠B+∠D+∠1=180°又∵∠1=∠A+∠2∠2=∠C+∠E∴∠A+∠C+∠E+∠B+∠D=180°(2
- 10关于函数y=2x2-8x,下列叙述中错误的是( )A.函数图象经过原点B.函数图象的最低点是(2,-8)C.函数图象与
热门考点
- 1在抛物线y2=4x上有点M,它到直线y=x的距离为42,若点M的坐标为(m,n)且m>0,n>0,则mn的值为_____
- 2下列每组中各有三对物质,它们都能用分液漏斗分离的是A.乙酸乙酯和水,酒精和水,植物油和水B.四氯化碳和水,乙酸和水,硝基
- 3实验室用双氧水和二氧化锰制取氧气,下列仪器不需要的是( )A.B.C.D.
- 4中国经济是国有经济与民营经济的并行发展,在这一过程中,民营经济不断壮大,国有资产不断增值。上述发展[ ]①说明要
- 5一列正弦机械波在某一时刻的波形曲线如图所示,已知该波沿x轴正方向传播,其周期T=0.2s,则下列说法正确的是( )A.
- 625℃和101 kPa时,乙烷、乙烯组成的混合气体50 mL与过量的氧气混合并完全燃烧,恢复到原来的温度和压强,气体的总
- 7托盘天平的两端分别放上质量相等的A、B两烧杯,调节至平衡,然后在A、B两烧杯中分别放入质量相等且足量的稀盐酸,再在A烧杯
- 8下列句子中,标点符号的使用正确的一项是[ ]A.大家都认为自己是在表现现实。在加缪看来,现实是荒诞的;在梵高看来
- 9填空。(7分)小题1: ,对影成三人。(《月下独酌》李白)小题2:艾青《我爱这土地
- 10如图为一高等雄性动物细胞分裂某时期结构示意图。已知基因A位于①上,基因b位于②上,则该动物体产生Ab配子的可能是(注意: