发(x)=√2sin(π/4+2x) 1.、求f(x)的单调区间 2、若2xˆ2-πx≤0,求f(x)的值域

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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 求证:(sin 2x /(1-cos 2x) )·(sin x /(1+sin x))=tan (π/4-x/2). 发(x)=√2sin(π/4+2x) 1.、求f(x)的单调区间 2、若2xˆ2-πx≤0,求f(x)的值域 f(x)=(1+cotx)sin^2x-2sin(x+π/4)sin(x-π/4)还有一题, 已知函数f(x)=(1+1 anx)sin^2x+m sin(x+π/4)sin(x-π/4) 2sin(x+π/4)sin(x-π/4)=? 化简2sin^2[(π/4)+x]+根号3(sin^x-cos^x)-1 已知sin(π/2-x)+sin(π-x)/cos(-x)+sin(2π-x)=2009,则tan(x+5π/4)等于?已知sin(π/2-x)+sin(π-x)/cos(-x)+sin(2π-x)=2009,则tan(x+5π/4)等于() A.-2009 B.-1/2009 C.1/2009 D.2009 f(x)=(√2 sin x + cos x)/(sin x +√(1- sin x)) (x∈ [0,π] 的最大值? 已知函数f(x)=[2sin(x-π/6)+√3sin x]cos x+sin^2x,x∈R 已知sin(x+π/6)=1/4,求sin(5π/6-x)+sin^2(π/3-x) 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 求证(cos^2 x-sin^2 x)(cos^4 x+sin^4 x)+1/4 sin 2x sin 4x=cos 2x 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)] f(x)=sin(2x-π/4)-2√2sin²x的最小正周期注:2√2sin²x,sin²x不在根号下 化简f(x)=(1-√2*cos(2x-π/4))/sin(π/2-x) 化简f(x)=(1+√2*cos(2x-π/4))/sin(π/2-x)