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求下面三角函数题目的解析, 直角三角形的边角关系直角三角形角度分别是90度、60度、30度.长直角边为1.22米,请问短直角边是多少米? 学田街道要修一条长3200米的路.已经修好了700米,再修多少米正好修完这条路的1/2? 修一条长200米的马路,第一天修了5分之1,第二天比第一天多修了5分之1,再修多少米正好是这条路的2分之1? 方便的反义词是什么 方便 反义词是? 谢谢 急~~~~ 三角函数,1.sin42°36′＝＿(精确到0.01）；2.在△ABC中,①若sinA＝0.9640,则∠A＝＿（精确到1″）②若tanA＝8.665,则∠A＝＿(精确到1′）；3小刚在距离某电信塔10m的地面上9（人和塔底在同一水平面 三角函数解答((sin35)^2-0.5)-0.5))/(cos10*cos80)=?A+B+C=180 tana+tanB+根号3=根号3*tanA*tanb.c=?第一个式子是(sin35^2-0.5)/(cos10*cos80)=? 谈谈你对现在的国学热的见解（或看法）随便说说 求三角函数答案 挖一条24千米长的水渠.第一周挖可全长的2/5.余下的第二周挖完.地二周挖了多少前米?列式计算 某某村要挖一条长5分之4千米的水渠,已经挖了10分之3千米,再挖多少米正好使已挖的长与全长的比是1比2 国学热的发起者是谁有米有? The shoes in our store are all of good quality,so you can choose ( )you like.A.whicheverB.whatever Three trees can do the job of 15 air conditioners running almost all day.中文翻译 an amount of与amount of 的用法与区别? a number of与an amount of的区别及意义要详细一点噢,急这算什么区别，我要考试了， 国学热是什么时候出现的 已知数a与数b是互为倒数关系,则a与b（） A正比例关系 B反比例关系 c不成比例关系 把一个圆柱体削成最大的圆锥体.削去的部分与圆锥体的体积之比是（）A3：1 B2:1 C2:3 D1:3 1、Green space facilities are contributing to an important extent to the quality of the urban envir2、Fortunately it is no longer necessary that every lecture or every book about this subject to start with the proof of this idea.3、At present it i Mr.Green often went to Japan to see his daughter by air.(同意句改写） Mr.Green ____ to ____toJapan to see his daughter. Last Wednesday,Mr.Green took his class to the Space Museum.There ____many things about space.空格内填什么?are 还是 were?课本有一篇是这样的：A：Kangkang，where shall we go？B：Whate about West Hill? I have been there before.It [i 什么是世界观和价值观? 如果要制作一张安全手抄报那应该取什么题目?内容为安全性的 安全知识手抄报怎么设计?不要太花哨, 也不要太幼稚, 急!主要是版面设计! Lots of people in urban areas are now concerned about the quelity of the air they ___ (breath).括号中的词变为适当的形式填入空白处,略作说明,顺便翻译一下句子. 假如你去商场买件蓝色衬衣,一下是你与售货员的对话1can help you 2for whom do you buy the shirt?3what size and what colour?下面是看图说话,我概述一下,要六句以上“我”妈妈坐在凳子上看书,爸爸坐在床上 用英语回答几个简单的问题.用英语回答一些简单的问题 ：）1.what's your 3 goals for this year?2.what's your favorite quotation?3.what bugs me?4.what's your favorite book?5.what's on your ipod?6.what't your favorite TV show?7.5 m 翻译句子他们正在考虑去哪儿.They are 回答(空格*5）刚才我忘了告诉你,我把你的钢笔放家里了I（空格）to tell you just now and I （空格） you pen at home我没有联系英语的搭档I do not have a (空格*3）En 谁能回答我几个简单的英语问题1."it's about time."在口语中是什么意思,还有它的用法2.start to do sth和start doing sth的区别3.下面几个短语的意思：1.working out details 2.double the work 3.i think that's about rig 回答一些简单的英语问题high的同音词特别喜欢的=(英语)紫色=here的同音词very much=(英语)poor的反意词help...to do sth.=_______=_________expensive.dear的反意词there的同音词heavy的反意词busy的反意词clever的 怎样看待当今的国学热