化简f(x)=cos(-x/2)+cos(4k+1/2-x/2)
求导:f(x)=sinkx*sin^k(x)+coskx*cos^k(x)=cos^k(2x)
化简f(x)=2cos(x/2)·(sin(x/2)+cos(x/2))-1
函数f(x)=cos(-x/2)+根号3cos(4k+1/2派-x/2),k属于Zx属于R(1)化简f(x)求最小正周(
已知f(x)=sin(x/2) + cos(x/2) +[cos(x/2)]^2-1/2
已知函数f(x)=2Cos x(Sin x-Cos x)+1
已知函数f(x)=6cos^4x-5cos^2x+1/2cos^2x-1,求f(x)的定义域值域
化简f(x)=cos((6k+1)/3*π+2x)+cos((6k-1)/3*π-2x)(x∈R,k∈Z),并求函数f(
函数f(x)=-√2(sin2x+π/4)+6 sin x cos x-2cos²x+1
1.化简f(x)=cosx(asinx-cosx)+cos(π/2-x)cos(π/2-x).2.化简f(x)=4cos
求导f(x) = cos(3x) * cos(2x) + sin(3x) * sin(2x).
化简f(x)=(1+√2*cos(2x-π/4))/sin(π/2-x)
化简f(x)=cos【(6k+1/3)π+2x】+cos【(6k-1/ 3)π-2x】+2sin(π/6-2x)(x∈R