sin(at)函数的导数

"辽宁省大连市经济技术开发区"用英文怎么写?切急! 中国辽宁省大连市中山区发达街20号802室 用英语怎么说..急用...中国辽宁省大连市中山区发达街20号802室 跟 中国辽宁省大连市中山区民主广场经典生活802室 都帮我翻译成中文...急用..... 英语翻译 辽宁省大连市如何翻译? 瞬间动词有哪些/、、、?、、、?、、?、、?、、?、还有，什么是瞬间动词？ 声音在生活中有什么应用 声音在生活中的利用 在三角形ABC中,A,B,C为三个内角,f（B）=4cosB·[sin(π/4+B/2)]^2+√3cos2B-2cosB(1)若f（B）=1,求角B的度数（2）若f（B）-m>2恒成立,求m的取值范围详细过程 谢! 组句 spend three week she in read the book spend three week she in read the book (连词成句） 用spend three week she in read the book连词造句用所给词的适当形式组成句子 是杨幂的蜜蜂多还是刘诗诗的狮子多呢我是蜜蜂也是狮子 如果你是蜜蜂或狮子的话 你就直接说 并说出你对杨幂或刘诗诗的看法和你心中认为是蜜蜂多还是狮子要讲文明不能骂人哦 有没有蜜蜂可以为了杨幂去死的? 爱幂幂（杨幂）的蜜蜂们进哦!加蜜蜂群!蜜蜂们 永远爱幂幂哦 不管什么原因 只要是爱幂幂的蜜蜂就加群吧 146922697（甜幂、花园～蜜蜂love～）蜜蜂们 为幂幂加油吧! 设A为三阶矩阵,且|A|=二分之一,求|（3A）^-1 - 2A^*|的值. 设A为2阶矩阵,若|3A|=3,则|2A|=（ ） A.B.1 C.D.2不好意思，选项认定错了。A 1/2 B 1C 4/3 D 2 设A为4阶矩阵,A*为A的伴随矩阵,且｛A｝=1/2,则｛（3A)^-1-2A*｝=? 同问设A为n阶矩阵,且|A|=2,则|3A^-1-2A*|=为什么不可以变成A((1/3)A^(-1)-2A*)=(1/3)E-2AA*=-8/27?哪里错了? A为3阶矩阵,A*为A的伴随矩阵,|A|=1,求|（2A）^-1 +3A*| 求此题原文或答案:Mrs Green has a busy job.She is very_1__after work every day and wants to have a good sleep. But Mr Green is a soccer fan. He watches soccer on TV very__2___every night,and sometimes he__3___at two o‟clock.Mrs.Green ask A:Mrs Baldwin.She can sing many English songs.B:Really?_______回答在这儿.A:Yes,I do.I think English is very interesting Mrs Black loves flowers very much and she has a small but beautiful garden(花园),In summer the flowMrs Black loves flowers very much and she has a small but beautiful garden(花园),In summer the flowers are very (1)n＿.One day ,the doorbell(门 Mrs Wang has a_____son.So she has to try her best to make money because of her son'sMrs Wang has a_____son.So she has to try her best to make money because of her son's____A ill; illness B sick; sickness C ill; ill D sick; sick She wants -----an English book. A.buy B.buys C.to buy D.sells 选什么?为什么? 对划线部分提问 She is goingto buy an English store-book.She is goingto buy an English store-book.buy an English store-book加下划线 She went to a bookshop to buy a book的句子成分在She went to a bookshop to buy a book中,she 是主语,went 是谓语,to a bookshop怎样讲,to buy a book是不定式,表目的,是目的状语, 对划线部分提问.She is going to buy an English book in the bookstore by bike this afternoon.“She”是第一个横线,“an English book"是第二个,“in the bookstore"是第三个,"by bike”是第四个,“this afternoon"是第五个. She buys a book,and () buy one,too.A.me B.my C.i 已知n阶方阵A满足关系式A^2-3A+2I=0,其中I是n阶单位矩阵,且A的特征值全部为1,试证A=I1楼是严重不对的 试证若n阶方阵A满足A^2=A,则A的特征值为0或1 光的折射与反射的区别 求下列函数最大值及最小值 1.y=1/2cosx+√3/2sinx 2.y=sinx-cosx 3.y=√3sinx+cosx