07年高考題分類匯總平面向量1.doc

1、last week, our economic work conference held today, held the county's rural areas for work and "five water treatment", "three to split" conference, which this year was a matter of "thirteen-five" important meeting of our county's economic and social development.

2、 the main task of the meeting was, on rural work and conscientiously implement the central, provincial and municipal "five water treatment", "three to split" series of important conferences, learn from the past, study deployment priority tasks this year. just now, the xxx deputy

3、head and deputy county magistrate, respectively, on the work of the xx was fully deployed, and put forward specific measures and requirements about is in place. county environmental protection bureau, the xx town, town of xx 3 units for a position statement, resounding, demonstrated determination an

4、d confidence. conference also recognition has advanced representative, this, i also representative county, and county government, to by recognition of advanced said warm of congratulated! to rural, and water and three modified a split front general cadres workers extend sincere of greeting! followin

5、g, i again told five points views: a, and deepening awareness, further enhanced work of sense and urgency since party of 18 session v plenary proposed has "innovation, and coordination, and green, and open, and shared" five big development concept hou, rural and environment governance work

6、 can said was upgrade to has more high of strategy level, is " thirteen-five "build well-off a top priority task. xx, county besides lingxi, longgang, jinxiang, the treasury, the hills, several industrial town outside the city centre, is basically belong to other rural areas, area, the vas

7、t rural population. same time, the current and coming period, is the county into a crucial period of the south gate of xx beautiful, environmental regulation directly affects the effectiveness of the strategic objectives can not be achieved. therefore, the focus on rural work and "five water tr

8、eatment", "three to split", the xx economic and social development has an important role. last year, through the joint efforts of the county, reform of the agricultural and rural development has made great progress in our county, environmental remediation and achieved initial results.

9、 "three agriculture" agricultural modernization level continues to increase, new 4-level modern agriculture park, released 20 agricultural leading enterprises above the county level, the county area of 200 acres of land more than eco-leisure, investments of more than 5 million yuan reached

10、 more than more than 100 agricultural projects. rural development has improved continuously, boutique line 1 completed the beautiful countryside, fine village 17, beautiful rural development conference was held in lingxi peach lake in the city. promote comprehensive rural reform, included in the pro

11、vince's building "three in one" system of farmers ' cooperative economic organization first promoting the county. improvement of farmers2007年高考數(shù)學(xué)試題匯編平面向量（北京4）已知是所在平面內(nèi)一點，為邊中點，且，那么（）（遼寧3）若向量與不共線，且，則向量與的夾角為（ d ）a0bcd（遼寧6）若函數(shù)的圖象按向量平移后，得到函數(shù)的圖象，則向量（ a ）abcd（寧夏，海南4）已知平面向量，則向量（）（福建4）對于向量和實

12、數(shù)，下列命題中真命題是（ b ）a若，則或b若，則或c若，則或d若，則（湖北2）將的圖象按向量平移，則平移后所得圖象的解析式為（）（湖北文9）設(shè)，在上的投影為，在軸上的投影為2，且，則為（ ）abcd（湖南4）設(shè)是非零向量，若函數(shù)的圖象是一條直線，則必有（ a ）abcd（湖南文2）若是不共線的任意三點，則以下各式中成立的是（ b ）abcd（四川7）設(shè)aa,1，b2，b，c4,5，為坐標(biāo)平面上三點，o為坐標(biāo)原點，若上的投影相同，則a與b滿足的關(guān)系式為 （ a ）(a) (b) (c) (d) （天津10）設(shè)兩個向量和，其中為實數(shù)若，則的取值范圍是（）-6，1 （-6，1-1，6（浙江7）若非

13、零向量滿足，則（） （浙江文9）若非零向量、滿足一，則（）(a) 2一2 (b) 2一2(c) 22一 (d) 22一（山東11）在直角中，是斜邊上的高，則下列等式不成立的是（c）（a） （b） （c） （d） （山東文5）已知向量，若與垂直，則（ ）ab cd4（重慶5）在中，則（）dcab題（10）圖（重慶10）如題（10）圖，在四邊形中，則的值為（）（上海14）直角坐標(biāo)系中，分別是與軸正方向同向的單位向量在直角三角形中，若，則的可能值個數(shù)是（b） 1 2 3 4（全國3）已知向量，則與（a）a垂直b不垂直也不平行c平行且同向d平行且反向（全國5）在中，已知是邊上一點，若，則（ a ）ab

14、cd二、填空題（安徽13）在四面體中，為的中點，為的中點，則 （用表示） （北京11）已知向量若向量，則實數(shù)的值是（北京12）在中，若，則（廣東10. ）若向量、滿足的夾角為120°，則 .（湖南12）在中，角所對的邊分別為，若，b=，則 （湖南文12）在中，角所對的邊分別為，若，則 （江西15）如圖，在中，點是的中點，過點的直線分別交直線，于不同的兩點，若，則的值為2（江西文13）在平面直角坐標(biāo)系中，正方形的對角線的兩端點分別為，則（陜西15. ）如圖，平面內(nèi)有三個向量、,其中與與的夾角為120°，與的夾角為30°,且|1，|，若+（，r）,則+的值為 .（天津

15、15）如圖，在中，是邊上一點，則（天津文15）在中，是邊的中點，則（重慶文（13）在abc中，ab=1,bc=2,b=60°，則ac。（上海文6）若向量的夾角為，則 三、解答題：35（寧夏，海南）17（本小題滿分12分）如圖，測量河對岸的塔高時，可以選與塔底在同一水平面內(nèi)的兩個側(cè)點與現(xiàn)測得，并在點測得塔頂?shù)难鼋菫椋笏呓猓涸谥?，由正弦定理得所以在中?6（福建）17（本小題滿分12分）在中，（）求角的大小；（）若最大邊的邊長為，求最小邊的邊長本小題主要考查兩角和差公式，用同角三角函數(shù)關(guān)系等解斜三角形的基本知識以及推理和運算能力，滿分12分解：（），又，（），邊最大，即又，角最小，邊

16、為最小邊由且，得由得：所以，最小邊37（廣東）16.（本小題滿分12分） 已知頂點的直角坐標(biāo)分別為.（1）若，求sin的值;（2）若是鈍角，求的取值范圍. 解：(1) , 當(dāng)c=5時， 進而(2)若a為鈍角，則abac= -3(c-3)+( -4)2<0 解得c>顯然此時有ab和ac不共線，故當(dāng)a為鈍角時，c的取值范圍為，+)38（廣東文）16(本小題滿分14分) 已知abc三個頂點的直角坐標(biāo)分別為a(3，4)、b(0，0)、c(，0) (1)若，求的值；(2)若，求sina的值解: (1) 由 得 (2) 39（浙江）（18）（本題14分）已知的周長為，且（i）求邊的長；（ii）

17、若的面積為，求角的度數(shù)（18）解：（i）由題意及正弦定理，得，兩式相減，得（ii）由的面積，得，由余弦定理，得，所以40（山東）20（本小題滿分12分）如圖,甲船以每小時海里的速度向正北方向航行,乙船按固定方向勻速直線航行,當(dāng)甲船位于處時,乙船位于甲船的北偏西的方向處,此時兩船相距20海里.當(dāng)甲船航行20分鐘到達(dá)處時,乙船航行到甲船的北偏西方向的處,此時兩船相距海里,問乙船每小時航行多少海里?解：如圖，連結(jié)，是等邊三角形，在中，由余弦定理得，因此乙船的速度的大小為答：乙船每小時航行海里.41（山東文）17（本小題滿分12分）在中，角的對邊分別為（1）求；（2）若，且，求解：（1）又 解得，是銳

18、角（2）， ，又42（上海）17（本題滿分14分） 在中，分別是三個內(nèi)角的對邊若，求的面積解： 由題意，得為銳角， ， 由正弦定理得 ， 43（全國文）（17）（本小題滿分10分）設(shè)銳角三角形abc的內(nèi)角a，b，c的對邊分別為a，b，c，（）求b的大??；（）若，求b解：（）由，根據(jù)正弦定理得，所以，由為銳角三角形得（）根據(jù)余弦定理，得所以，44（全國）17（本小題滿分10分）在中，已知內(nèi)角，邊設(shè)內(nèi)角，周長為（1）求函數(shù)的解析式和定義域；（2）求的最大值解：（1）的內(nèi)角和，由得應(yīng)用正弦定理，知，因為，所以，（2）因為 ，所以，當(dāng)，即時，取得最大值living standards, poor fa

19、rmers in less than complete elimination of 4600 yuan, 8949, 19008. "five waters rule": the county invested 2.169 billion yuan, similar counties line the city's first complete the 42 km of sewage pipe network construction, completion rate ranked first in the city, won the provincial rur

20、al sewage treatment work better; key pollution sources such as electroplating, papermaking, chemical industry management through verification and acceptance of the municipal government, the county removed black and odorous river, river waste, beginning of river ecological restoration effects. "

21、three modified a split" aspects: county total demolition illegal area up 2.759 million square meters, completed city issued annual task of 153%, split against area ranking city second; completed "three modified" area 4.846 million square meters, completed city issued annual task of 40

22、3%, ranking city third, which village in the a target completed total city ranking first; county government was named city level "three modified a split" work advanced. these achievements are hard won and should be appreciated. however, we are fully aware, the new period, and work in the c

23、ountryside and the environment facing higher standards and requirements, provincial party committee offered to high level build a comprehensive well-off society goal requires "no filth, dirty environment illegal buildings, into a well-off" municipal party committee also proposes to build i

24、nto the well-off benchmark goals of the city. compared with the superior claim, "south gate of xx beautiful" goal, my county "san nong" and environment there are a number of weaknesses and gaps, highlighted in the following five aspects: first, agriculture remained "low"

25、; pattern. "low" is reflected in the quality and low; short, value added of the industry chain is low; 123 fusion yield low employee age, low quality. "small" is reflected in smaller, specialized cooperatives throughout the county there were 3,396, but on the scale of too little. "san" is reflected in production, management, services, decentralized, centralized, standardized, brand, information and organizational level is not high. second, the countryside is still in "dirty" phase. "dirty&qu