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☆急：已知函数f(x)=3Sin(2x+α)(α∈(0,π/2))其图像向左平移π/6个单位后关于y轴对称(1)求函数f(x)的解析式 函数f(x)=3sin(2x+5θ）的图像关于y轴对称,则最小正角是多少 将函数y=3sin(2x+π/3)的图象按a平移后,得到的图像关于原点成中心对称,求a的坐标. 若函数图像关于原点对称,则这个函数是奇函数这是真命题还是假命题?为什么？ 有一道数学题：已知f(tan x)=cot 3x－cos 3x,求f(cot x)的表达式.麻烦您写具体点,在下拭目以待! 分式计算（9x的平方-1）÷（1-3x） ( )have you been helping with the work -About one and a half years.Which of the following is NOT right?A.How long B.How many yearsC.Since whenD.WhenI haven't seen your father for ages!-He( )Nanjing and he( )there for another five days.A.has been to ; 补全对话,每空填一词.T：Mum ,why are you in a (1) M：The (2) truck is outside.I must go downstairs to (3) the rubbish in it now.(a moment later ,Mum goes upstairs again.)T：Mum ,how do you know the truck is (4) .M：Can’t you hear the mu 同义句改写1.Tom has to stay at home .I also have to stay at home__________ Tom __________ I ___________to stay at home. 英语九年级（上）——课时作业——拓展提升VII、阅读下面对话并填空,使对话意思完整.A：Hi,Bill!You are reading the novel again.B:Yes,Tom.I'll never be tired of it.A:________?B:Three times.Every time I read it,I can le 选择单词的正确形式填空behaivour description support conservation campaign give birth to female birthday long specially adopt mainly survival west punish hunt protect centre1.Lion in a zoo do not ____ like lions in the wild .2.Please ______ 根据句意选择单词并用其适当形式填空.1.surprised；2.everyone；3.group；4.heat；5.cool.1.Your dress looks .Is it new?2.The of the sun makes me hot.3.A of chidren aer piaying football over there.4.I'm that the little boy can speak En 求不等式X-3/2+6X-1/6大于-3 初二英语…选择合适的单词并使用其适当形式填空 求不等式2分之X-3+＞6分之6X-1 求使式子log3(9^x-12*3^x+27)有意义的取值范围 若关于x的方程9^x+（4+a）•3^x+4=0在[-1,1]上恰有两个相异实根,则实数a的取值范围是___． 若3^x>1/27则x的取值范围 若3 如果-3(x+3)＞-27,则x的取值范围是多少 根据句意选择正确的单词填充括号.（英语）At ( ) people often sit in the open air and eat mooncakes.A.noon B.night C.twelve D.one 高中英语新课标必修五unit 1练习 二、练习 一）单词拼写求解答1.My computer is infected with some sort of v______ and does’t work.2.A_____ from a few faults,he is a trustworthy teacher.3.Will you a______ the wedding ceremony to 设y等于Y括号X是由方程e的x方减e的y方等于sin括号xy所确定的隐函数,求微分dy 1`已知sina+cosa=2/3,a属于(0,派)求sina,cosa的值2`已知A为锐角,则logsina(1+cota^2)=? 1.2sina+sin2a=2sina^3/1-cosa2.(a^2-b^2-c^2)tanA+(a^2-b^2+c^2)tanB=0第二题是在三角形ABC中 已知a、b为锐角,且满足3sin^2a+2sin^2b=1,3sin2a-2sin2b.求证a+2b=3.14/23sin2a-2sin2b=0 英语选修六单词录音 山东省专用 英语顺序选修六单词录音第一单元的题目是Small Talk 谁给个英语选修6的单词录音啊我要新版的高中2年纪的liucheng6688@sina.com发给我就好 什么是 立方根?         算术平方根.  算术立方根?        麻烦你今晚回答 苏教版高中数学必修四知识点总结 两个正方形,小正方形边长比大正方形边长的一半多4,大正方形面积比小正方形面积的2倍少32,则大、小正方形的边长依次是（）A.18和10     B.17和11     C.16和12 &