参数方程求二阶导数

为什么美国人读“can't”的读音是我们中国人度"can"的读音? 迷茫繁体字怎么写 我的心里只有你 繁体字 Listen To Your Heart男女说唱版MP3地址 1.已知cosa=3/5,且a属于(3Π/2,2Π),则cos(a-Π/3)= 2.VABC中,sinA=3/5,cosB=5/13,则cosC=? 三角恒等变化sin a/2—cos a/2=1/5 求sin a急 listen to your heart的MP3格式? 搜集与桥有关的古诗或传说,用描述性语言将你最喜欢的故事或传说写下来 几道高一三角函数恒等变换题1.已知sinα=(√5-1)/2,则sin2(α-π/4)=2.化简√(1+sin100)-√(1-sin100)3.设方程x²-(tanα+1/tanα)x+1=0的一个根式2+√3,求sinα的值.4.求证：sin2x/[(sinx+cosx-1)(sinx-cosx+1)]=1/tan(x/2).5 高一三角函数恒等变换题 高一三角恒等1) 证明 tan^2 x + 1/(tan^2 x) = [2(3+2cos4x)]/(1-cos4x) 2) (1+tan22)(1+tan23)(1+tan24)(1+tan25)=? 在hit FM里Grace主持的工作随身听里的广告里有首歌like it like,like it like叫...在hit FM里Grace主持的工作随身听里的广告里有首歌like it like,like it like叫什么名字? did she( )the mccting a.take part in b.take part for c.tok part in应选择哪个 HIT FM中有首电音发音好像是like j six 的歌名是神马? did she ____the meeting?A.take part in B,take part for C,took part in hit fm音乐有一首女的唱的好像有句歌词是i am look like sugar求歌名 She wants to take part in sports meet.同义句Please color the desk orange.同义句 求hit FM里面广告后有首歌的歌词含：just like like like…… 女唱的 我英文不太好 大概这些单词读音吧 She is e------- to take part in the Games. 英语翻译你,算什么?帮忙翻译这句话 英语翻译我是相信爱情的,并不因为寂寞,但对自己的爱情有些不确定,有的人爱上一个人很容易,有的人爱上一个人很难,我则属于后者,或许会喜欢多个人,可绝不会轻易的爱.出生二十余年,也在 陈冠希是混血儿吗?听说她妈妈是,他属于混血儿吗? For many of us,the idea of a family is a lot narrower than it used to be.Today children go away to college,and take up jobs wherever chances seem greatest.So instead of growing up in a family with grandparents,aunts,uncles and cousins,many of us are want to know the difference between take an interest in and take interest in Harry Potter is the book I take much interest 改错 公主的英文怎么写?我只是因为写到不会想知道.是什么呢? 公主用英文怎么写 There are only a few small pockets of low employment.翻译 There are only two small things that i dont like about tokyo.请问这句怎么翻译! 十八岁的天空眼里含满迷茫繁体字怎么写呀 一年级学生学习的儿歌? Ican not do that now .There is another tiger over there.