1-2sin?√6﹢√2／4 用 word打的

sin0=0 sin(1/6π)=1/2sin(1/3π)=√3/2sin(1/2π)=1sin(2/3π)=√3/2sin(5/6π)=1/2sin(π)=0sin(-π)=0sin(-5/6π)=-1/2sin(-2/3π)=-√3/2sin(-1/2π)=-1sin(-1/3π)=-√3/2sin(-1/6π)=-1/2sin(7/6π)=-1/2sin(4/3π)=-√3/2sin(5/3π)=-√3/2sin(11/6π)=-1/ 傅里叶级数作图f（x）=2sin[x] - sin[2x] + 2/3sin[3x] - 1/2sin[4x]我用mathematica输入程序Plot[{2sin[x],-2sin[x],2sin[x] - sin[2x],-2sin[x] + sin[2x],2sin[x] - sin[2x] + 2/3sin[3x],-2sin[x] + sin[2x] - 2/3sin[3x],2sin[x] - sin[2x] + 2/3si 1-2sin?√6﹢√2／4 用 word打的 已知sin[a-b]cos a-cos[b-a]sin a=3/5,b是第三象限角,求sin[b+5π/4]的值第一题1/2cos x-√3/2sin x第二题√3sin x+cos x第三题√2[sin x-cos x]第四题√2cos x-√6sin x 已知α是第四象限角,化简（1/2)^|sinα|+√(4^sinα-2^(1+sinα)+1 为什么sin-sin^2=1/4 英语翻译1,The taste is great.(雀巢咖啡)2,Ask for more.(百事流行鞋)3Let't do the things better.(飞利普公司)4A wor|d of comfort.(日本航空公司) (1-sin^6a-cos^6a)/(sin^2a-sin^4a) 化简√[1-2sin(π-3)cos(π+3)]-√2sin(3+π/4) 英语翻译1Why do you want to work for this firmkompany?2why did you choose___as your major?3why should I hire you and not someone else?4Would you describe yourself as a moralPerspn?5Is if wrong to lie?6Have you ever told a lie?what?7What's the wor 用英语写一篇暑假打工的短文试用所给短语 写一篇100词左右的短文(1)keep on asking my parents for money(2)learn the value of money(3)get along with others(4)find it's good preparation for/get prepared for(5)get a little bit wor 小学英语题求教第4幅图是接着第3幅后面的可能有点看不清二、判断下列句子中两个单词划线部分发音是否相同,用“T”或“F”表示： ( ) 1、That tall man likes walking to work. ( ) 2、Don’t wor s = 2*sin(x)-sin(2*x)+2/3*sin(3*x)-1/2*sin(4*x)+2/5*sin(5*x)用matlab画图,求教啊 证明一个sin&cos的等式证明 1+sin^2(x)+sin^4(x)+sin^6(x)=[1-sin^8(x)]/[cos^2(x)] 接龙填词.（如：here ear red) (1)father___mother fat____thin fast____slowson ___daughter big_____small tall____short(2)know____know present_____present read ____readgame____game wrong____wrong March____March(3)pen___eraser shirt____trousers wor cos^6(π/8)-sin^6(π/8)=求值,[cos^2(π/8)-sin^2(π/8)][cos^4(π/8)+sin^4(π/8)+cos^2(π/8)sin^2(π/8)]=cos(π/4)[1-cos^2(π/8)sin^2(π/8)]=cos(π/4)[1-[sin^2(π/4)]/4]==7√2/16 请会的大哥大姐多多指教.已知sinθ=(√5-1)/4(1)求(sinθ-cosθ)/(sinθ+cosθ)+(sinθ+cosθ)/(sinθ-cosθ)的值.(2)已知5sinθ+12cosθ=0,求(sinθ+9cosθ)/2(2-3sinθ)的值. 数学题问答（三角函数）已知sinα的值,在区间[﹣pai/2,pai/2]内求角αsinα=√3/2; sinα=﹣√2/2; sinα=﹣1/2; sinα=1; sinα=1/4; sinα=﹣5/8; sinα=0.688; sinα=﹣0.123.已知sinα的值，在区间[﹣pai，pai]内求角αsi