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已知sin(派/4-a)=5/13,a属于(0,派/4),求cos2a/[cos(派/4+a)]的值 初二数学因式分解练习题50道 我每天都和朋友打篮球用英语怎么说?paly用不用+ing? 英语翻译 英语翻译My life has changed a lot in the last three years.I used to have a bad habit of being late for school but now I don’t.I used to copy my classmates’ homework,but now I do it all by myself.I had few hobbies in the past,but now I have ma 英语翻译Today's the day of a big test at school,and you feel awful.Your stomach hurts and you have a headache.Maybe your muscles feel tense and you feel shaky or sweaty.You know you haven't been bitten by the flu bug — but you may have a case o 已知sin(π/4-a）=5/13 a∈（0,π/4）求cos2a/cos(π/4+a) 19999+1999+99+9=?怎么用简便算法 “为自己培养良好的爱好” 英语怎么说? 对...产生兴趣 (延续性) 用英语怎么说 我能做的就是让他们对英语产生兴趣用英语怎么说______ i can do is _____ make them ____ ____ English 把下列各式分解因式2a(x+1)²-2ax² 分解因式：x²－a²－2x－2a 若B分之A大于零,B分之C小于零,那么A乘以C------- 1 大于零 2 小于零 3 不一定 4大于或等于零 1.计数单位的概念 2.A能被B整除（B不等于0） A是B的() B是A的（）? sin(π/4-a)=5/13(0 因式分解（a²-2a）²+2（a²-2a）+1（a²-2a）²+2（a²-2a）+1求过程,解题思路或公式 a²-b²-2a+1因式分解a²-b²-2a+1 第一题,因式分解 1,a²+2a+1=第二题,下列多项式中,能用公式法因式分解的是{ }a,x²+4 b,x²+2x+4 c,x²-x+四分之一 d,x²-4y 篮球用英语怎么说 他打篮球用英语怎么说 1024亩是多少平方米? 1024的平方是几?Meters/bonwe ,Jay Chou ,Will Pan and who I need her English name Thank you very much 1024是哪个数的平方 1024的平方怎么算请告诉我1024的平方是多少?怎么算的! 来吧,我们去打篮球用英语怎么说 英语翻译Learning in such a network proceeds the same way as for perceptrons:example inputs are presented to the network,and if the network computes an output vector that matches the target,nothing is done.If there is an error (a difference betwee 英语翻译【Strange Bed】I look at the moon tonight,on the porch,Missing my house,missing my parents.In the middle of the night,i lie awake with my pain.How can i sleep in this strange bed Yesterday,i was surrounding by my parents.Today,i must co 英语翻译After he passed away,i thought more and more about Tony"s career .he grew in stature in my mind .in the end ,i think he stood as tall,and as proud ,as the greatest American industrialists.they had all reached their success by the same rou 二分之一乘二,三分之一乘三,快捷方法 英语翻译1 What is London's first novel?2 how is the text developed 一老人有17头牛,分给老大二分之一,老二分三分之一,老三分九分之一,每人分几头牛?...一老人有17头牛,分给老大二分之一,老二分三分之一,老三分九分之一,每人分几头牛?(注牛不能杀）