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这道题选什么 have,your,game,school,you,do,at,soccer连词成句 81x-342=76(x-2)求解 锐角三角函数 变形tan（∠MAH＋∠NAH）＝1,怎么得到（tan∠MAH＋tan∠NAH）/（1－tan∠MAH·tan∠NAH）＝1 求sin4的三角函数值题目：（将函数化为锐角三角函数）.急!求帮助 a number of --------will come to visit our school next month.A.Japenese B.Australia C.Germen D.American 三角形ABC三角的正切相加大于0是什么形状的三角形 81X-342=72(X-2)解方程 sin(a+β)cos(r-β)-cos(β+a)sin(β-r)跟tan5π/4+tan5π/12 / 1-tan5π/12要怎么算 Look!Here comes our school bus. No hurry.Don't get on it stops. a.till b.after c.since d.when look!here comes out school bus no hurry,.don't glook!here comes out school bus no hurry,.don't get on it __it has stopped 设sin(∏-2)=a,则tan(∏/2-2)的值为 键盘上小数点符号怎么会是句号符号谢谢大家指点 20x-18x=3这道题因该怎么算? 8X+12=18X+7 （怎么解） 18x-7*3=15怎么解? 诧异\惊异的区别是什么 惊奇和惊叹有什么区别? 惊讶与惊奇区别 our new school plan 英语作文60字左右 谁能人为的给我写篇英语作文.our new school . BobandEric play games on the playground after school._ _BobandEric_ _on the playground?划线部分提问 Bob and Eric play games on the playground (after school).对( )部分提问 after lunch we play games on the playground read books in the classroom.在玩游戏和读书之间选择A and B.or N棱柱底面图形是什么? 已知0小于等于X小于等于π/2,求函数f（x）=cos^2x-2acosx的最大值M(a)和最小值m(a) 35(x+1)=40(x-1)+(40-5)方程过程 Sometimes he ______(play)basketball on the playground after school 方程x(35-x)=150过程 He__home after he played baseball in the school.填空,应该填什么时态 in are the playing playground teachers baseball the 神奇和奇妙有何区别?