f(x)=sin^4(x)-sinxcosx+cos^4,求f(x)的值域.化解得 1-1/2Sin^2(x)-Sinx ,得 [0,1] 之间 错了?

求导f(x) = 4x^3 + sin(x^2) 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 f(x)=(6sin^4x-7sin^2x+2)/(sin^2x-cos^2x) 已知f(x)=sin 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) f(x)=sin(x+π/4)图像怎样变成F(x)=cos(2x) 已知函数f(x)=cos2x/[sin(π/4-x)] f(x)=sin^4x的导数 f(x)=sin(x+π/4)是什么函数 求导f(x)=sin²x. f(x)=sin(-x)的奇偶性 f(x)=sin²(x+π/4)-sin²(x-π/4)是 函数f(x)=2sin(x+π/4)sin(x-π/4)+sin2x的值域 求f【x】=2sin[x+π/4]sin[x-π/4]+sin2x的最大值 证明∫( 0,π／2 ) (f sin x/(f sin x+f cos x) dx=π /4 若f(x)=sin(π/4)x,求f(1)+f(2)+.+f(2010) f'(sin x)=1-cos x 求f''(x)