sin(60-x)=1/4,cos(60+2x)=
求证(cos^2 x-sin^2 x)(cos^4 x+sin^4 x)+1/4 sin 2x sin 4x=cos 2
证明sin^2(x)+cos^2(x+30)+sin(x)cos(x+30)=3/4
MATLAB画图,y=sin(x)*(cos(x)-1)/((2*sin(x.^2)+4*cos(x)).^0.5)-(
sin(60-x)=1/4,cos(60+2x)=
已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x
三角等式求证:cos^6x+sin^6x=1-3sin^2x+3sin^4x
sin^2x+cos^2x)(sin^4x-sin^2xcos^2x+cos^4x) =sin^4x-sin^2xcos
证明(1-2sin x cos x )/(cos^2x-sin^2x)=(1-tan x)/(1+tan x)
已知sin X+cos X=m,|m|小于等于根号2且|m|不等于1,求sin X^3+cos X^3,sin X^4+
sin(sin(sin(sin(x)=cos(cos(cos(cos(x),X等于多少?
已知函数f(x)=cos^4 x-2sin x cos x-sin^4 x
求导f(x) = cos(3x) * cos(2x) + sin(3x) * sin(2x).