高中英语和数学题急~~~~~~~~~1.（）himbysurpriseandhehadnotimetothinkofanexcuse.A.tookB.seizedC.heldD.caught2.Chinahasapopulationof1.3billion,()itthelargestcountryintheworldbypopulation.A.makingB.madeC.ma

Question

高中英语和数学题 急~~~~~~~~~
1.（）him by surprise and he had no time to think of an excuse.
A.took B.seized C.held D.caught
2.China has a population of 1.3 billion,( )it the largest country in the world by population.
A.making B.made C.makes. D.has made
3.( ）global warming ,those present at the international meeting also discussed other issues.
A.In spite of B.But for C.Apart from D.Except for
4.( )herself to science,the great scientist took little notice (）the honors given to her.
5.-How come a simple meal like this cost so much?
-We have ()in your bill the cost of the teapot you broke juse now.
A.added B.included C.obtaoned D.charged
有能力者把选项的每个单词意思翻译一下,还有句子.
1.f(x)=2sin(2x+30°）+2满足f(x)=1且X属于[-180°,180°]的X的集合.
2.cos2x/sin(x-45°)=-（根号2/2）,求cosx+sinx的值
需要解题过程
谢谢了.

Answer 1

D
A
C
4不知道
5 选A 翻译：为什么这么简单的饭菜要这么多钱?
我们把你摔坏的那个茶壶算进的您的账单
数学
第一题
因为x在【-180°,180°】,所以,2x在【-360°,360°】.所以2x+30°在【-330°,390°】
因为 f(x)=1,所以sin（2x+30°）=1／2
将2x+30°看成一个大X
即sinX=1／2,X[-330°,390°]
如sin图可知,X为｛-330°,-210°,30°,150°,390°｝
第二题
因为cosx2x=cos平方x-sin平方x=（cosx-sinx）（cosx+sinx）
又因为sin（x-45°）=sinx*cos45°-sin45°*conx
=2分之根号2乘以（sinx-cosx）
所以cos2x/sin(x-45°)=-（cosx+sinx）除以（2分之根号2）
约分后得 cosx+sinx=1／2