Python程序设计基础知道章节测试答案
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cso15°cos30°＋cos105°sin30°的值是()A．22B．32C．12D．1
When sugar ______ enough, a black substance appears. A．heats B．is heated C．will heat D
已知cos(α＋β)=45，cos(α－β)=－45，且32π＜α＋β＜2π，π2＜α－β＜π，分别求cos2α和cos2β的值．
已知x，y为锐角，且满足cosx=45，cos(x＋y)=35，则siny的值是()A．1725B．35C．725D．15
The next night, the blackest he ______ , the sea became so rough that the boat almost turned over.
When the old man ______ to walk back to his house, the sun ______ itseff behindthe mountain. A．sta
The mother felt quite anxious because she ______ for quite a long time. A．haven&39;t heard
The mother felt quite anxious because she ______ for quite a long time. A．haven&39;t heard
The boy ______ .A bullet ______ through his chest on the left side. A．had died; passed B
My brother is an actor. He ______ in several films so far. A．appears B．appeared C．has appea
在△ABC中，内角A、B、C所对的边分别为a，b，c，已知tanB=12，tanC=13，且c=1．(Ⅰ)求tanA；(Ⅱ)求△ABC的面积．
In another month&39;s time, Henry ______ in the Weavewell Woolen Company&39;s office for five year
The police ______ outside the hall in large numbers. A．have stationed B．were stationed
在△ABC中，角A、B、C的对边分别为a、b、c，若AB？AC=BA？BC=k(k∈R)(1)判断△ABC的形状；(2)若c=2，求k的值．
Your phone number again？ I ______ quite catch it. A．can&39;t B．couldn&39;t C．don&39;t
In another month&39;s time, Henry ______ in the Weavewell Woolen Company&39;s office for five year
When sugar ______ enough, a black substance appears. A．heats B．is heated C．will heat D
3－sin170°1＋sin240°的值等于______．
In another month&39;s time, Henry ______ in the Weavewell Woolen Company&39;s office for five year
已知x，y≠kπ＋π2(k∈Z)，sinx是sinθ，cosθ的等差中项，siny是sinθ，cosθ的等比中项．求证：(1)cos2x=12cos2y；(2)2(1－
As she ______ the newspaper, Granny ______ asleep. A．read; was falling B．was reading; wa
The next night, the blackest he ______ , the sea became so rough that the boat almost turned over.
α、β为锐角a=sin(α＋β)，b=sinα＋cosα，则a、b之间关系为()A．a＞bB．b＞aC．a=bD．不确定
化简sin(φ＋750)＋cos(φ＋450)－3cos(φ＋150)的值为______．
在下列关于函数y=3sin2x＋cos2x的结论中，正确的是()A．在区间[－π3＋kπ，π6＋kπ](k∈Z)上是增函数B．周期是π2C．最
已知sin(α＋45°)=45，45°＜α＜135°，则sinα=()A．25B．－25C．7210D．－7210
当α=cosπ12时，行列式.2α＋1112α－1.的值是______．
在△ABC中，tanA＋B2＋tanC2=4，2sinBcosC=sinA，求A，B．
The fire of London ______ on a night of September, 1666. A．was broken out B．had broken o
在斜△ABC中，cb＋bc=8cosA，则tanAtanB＋tanAtanC=______．
α、β为锐角a=sin(α＋β)，b=sinα＋cosα，则a、b之间关系为()A．a＞bB．b＞aC．a=bD．不确定
When sugar ______ enough, a black substance appears. A．heats B．is heated C．will heat D
当α=cosπ12时，行列式.2α＋1112α－1.的值是______．
在△ABC中，角A，B，C所对的边分别为a，b，c，向量p=(sinA，b＋c)，q=(a－c，sinC－sinB)，满足p⊥q，则角B=()A．π6B．π3C．2
cos(α－15°)cos(α＋15°)＋sin(α－15°)sin(α＋15°)=______．
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