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1、1 锐角三角函数测试一、选择题（每小题3 分）1、已知 Rt ABC中，C=900，BC=3，AC=4，则sin A的值为（）A 43B 34C 53D 542.如果 A 是等边三角形的一个内角，那么cosA 的值等于（）。A、21 B、22 C、23 D、1 3在 ABC中，若22cos A，3tanB，则这个三角形一定是（）A锐角三角形;B 直角三角形;C钝角三角形;D等腰三角形.4在ABCRt中，90C，31sinB，则Atan的值为（）（A）113；（B）33；（C）22；（D）31010.5、等腰三角形底边长为10cm，周长为36cm，则底角的正弦值为（）。A、185 B、165 C
2、、1513 D、13126、如图，已知B=900，D=300，BCA=450，若 AB=5，则 CD 为（）（A）5（B）53（C）53-5（D）5+37、在平面直角坐标系内P 点的坐标（30cos，45tan），则 P 点关于原点对称点P1的坐标为（）A)1,23(B)23,1(C)1,23(D)1,23(8、如图所示，渔船在A 处看到灯塔C 在北偏东600方向上，渔船向正东方向航行了12 海里到达 B 处，在 B 处看到灯塔C 在正北方向上，这时渔船与灯塔C 的距离是（）（A）123海里（B）6 3海里（C）6 海里（D）43海里二、填空（每小题3分）1、已知 A 是锐角，且_2sin,3
3、tanAA则2、在 RtABC 中，C=90，若 AB=2AC，则 tanA=_.3、若关于x 的方程 x2-2x+cos=0 有两个相等的实数根，则锐角为_.第 6 题2 4、RtABC中,900C35tan,3BBC，那么._AC5、如图，小鸣将测倾器安放在与旗杆AB 底部相距6m 的 C 处，量出测倾器的高度CD1m，测得旗杆顶端B 的仰角60，则旗杆AB 的高度为（计算结果保留根号）6、如图，ABC中 cosB=22，SinC=53，AC=5，则ABC的面积是三、解答题（共76 分）1、（10 分）计算1)3sin 60tan30cos60 2）22cos 30cos 60tan60t
4、an30+sin45 2（10 分）由下列条件解直角三角形：在Rt ABC中，C=90：（1）已知 a=4，c=24，（2）已知 b=10，B=60文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6
5、 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G1
6、0D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M
7、9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10
8、E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1
9、D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码
10、:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D33 3、（8 分）如
11、图，一铁路路基横断面为等腰梯形ABCD，斜坡BC的坡度为3:2，路基高AE为3m，底CD宽12m，求路基顶AB的宽.BADCE4、（10 分）如图，河旁有一座小山，从山顶A处测得河对岸点C 的俯角为30,测得岸边点D的俯角为45，又知河宽CD 为 50m现需从山顶A 到河对岸点C 拉一条笔直的缆绳AC，求山的高度及缆绳AC 的长文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F
12、8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P
13、6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G
14、10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8
15、M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI1
16、0E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J
17、1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编
18、码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D34 5、（10 分）如图，O 是ABC的外接圆，点D在 OC的延长线上，sinB=21，D=300。（1）求证：AD是 O 的切线；（2）若 AC=6，求 AD 的长。7、（10分）如图,小岛 A在港口 P的南偏西 45 方向，距离港口8l海里处甲船从A出发，沿 AP方向以 9海里/时的速度驶向港口，乙船从港口P出发，沿南偏东6O 方向，以 l8海里/时的速度驶离港口.现两船同时出发，(1)出发后几小时两船与港口P的距离相等?(2)出
19、发后几小时乙船在甲船的正东方向?文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI
20、10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3
21、J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档
22、编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6
23、F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8
24、P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3文档编码:CN6F8Q5H8P6 HM1G10D6L8M9 ZI10E1H3J1D3