文史哲与艺术中的数学_智慧树章节答案
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His mother told me that he ______ read quite well at the age of five. A) should B) would C)在三角形ABC中，a，b，c分别是角A，B，C的对边，且满足m=(2b－c，cosC)，n=(a，cosA)且m∥n．(1)求角A的大小；(2)若a=4，在△ABC中，a，b，c是内角A，B，C的对边，且a2＋b2－c2－ab=0．(1)求角C；(2)设f(x)=sinx＋3cosx，求f(A)的最大值，并确定Don&39;t ______. I can help you with the typing. A) matter B) care C) worry D) concernMary has got a full mark in the test. She ______ very hard all these days. A) will work 已知tanA=2，则cos(π4－A)2sin2A2＋2sinA2cosA2－1=______．已知tanA=2，则cos(π4－A)2sin2A2＋2sinA2cosA2－1=______．He is too weak to ______ the heavy box. A) rise B) arise C) raise D) arouseHardly had I ______ when the play began. A) seated B) been sat C) sitted D) been seated设△ABC是锐角三角形，a，b，c分别是内角A，B，C所对边长，并且sin2A=sin(π3＋B)sin(π3－B)＋sin2B．(Ⅰ)求角A的值；(Ⅱ)已知a=(sinα，1)，b=(cosα，2)，α∈(0，π4)．(1)若a∥b，求tanα的值；(2)若a？b=178，求sin(2α＋π4)的值．Hardly had I ______ when the play began. A) seated B) been sat C) sitted D) been seatedIn that country, the cost of living ______ quickly after the war broke out. A) raced B) raisedWith all this work on hand, he ______ to the cinema last night. A) mustn&39;t go B) woMother ______ us stories when we were young. A) used to tell B) used to telling C) was 已知向量m=(2cos2x，3)，n=(1，sin2x)，函数f(x)=m？n．(1)求函数f(x)的最小正周期和单调增区间；(2)在△ABC中，a，b，已知tanα=3，则sin2α－3sinαcosα＋4cos2α的值是______．As a matter of fact, they would rather leave for Beijing than ______ in shanghai. A) stay B) Breakfast is ______ in the dining room from 6" 30 am to 9am at this hotel. A) served B) ma设△ABC是锐角三角形，a，b，c分别是内角A，B，C所对边长，并且sin2A=sin(π3＋B)sin(π3－B)＋sin2B．(Ⅰ)求角A的值；(Ⅱ)He is too weak to ______ the heavy box. A) rise B) arise C) raise D) arouse已知tanα=3，则sin2α－3sinαcosα＋4cos2α的值是______．求函数f(x)=53cos2x＋3sin2x－4sinxcosx(π4≤x≤7π24)的最小值，并求其单调区间．You ______ all those calculations! We have a computer to do that sort of thing. A) needn&39;t haveHis mother told me that he ______ read quite well at the age of five. A) should B) would C)The new evening dress ______ her as much as 400 dollars. A) paid B) took C) spent D) That&39;s all right. I can deal with it. You ______ with me. A) don&39;t need go B) need not toThe teacher told them ______ make so much noise, A) will not B) not to C) not D) don&39函数y=－3sinx＋cosx在[－π6，π6]上的值域是______．已知α，β为锐角，tanα=17，sinβ=1010，则α＋2β=______．
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