设函数f(x)=sin(2x-π/2),x∈R,则f(x)是奇函数还是偶函数?为何由f(x)=sin(2x-90°)=-sin(90°-2x)=-cos2x知f(x)为偶函数?我说为什么，是-cos2x=f(-x)吗？

设函数 f(x)=sin(2x+y),(-π 设函数f(x)=sin(2x+φ)(-π 设函数f(x)=sin(2x+φ)(-π 设函数f x=SIN(2X+φ)(-π 设函数f(x)=sin(2x+φ)(-π 设函数f(x)=sin(2x+φ)(-π 设函数f(x)=sin(2x+φ)(-π 设函数f(x)=sin(2x+φ)(-π 设函数f(x)=sin(2x+ φ)(-π 设函数f(x)=sin(2x+φ)(-π 设函数f(x)=sin(2x+ φ)(-π 设函数f(x)=sin(2x+φ)(-π 设函数f(x)=sin(wx+t)(-π/2 设函数f(x)=sin(wx+t)(-π/2 设函数f(x)=sin(2x+∮)(-兀 设函数f(x)=sin(2x+φ)(0 设函数f (x)=cos(2x-π/3)-2sin平方x (1)求函数f(x 设函数f(x)=sin(3x)+|sin(3x)|,函数的最小正周期为什么是2π?