下列函数中以π/2为周期的是 A=sin2x+cos4x B y=sin y2x乘cos4x C y=sin2x+cos2x D y=sin2x乘cos2x下列函数中以π/2为周期的是 A=sin2x+cos4x B y=sin y2x乘cos4x C y=sin2x+cos2x D y=sin2x乘cos2x

下列函数中以π/2为周期的是 A=sin2x+cos4x B y=sin y2x乘cos4x C y=sin2x+cos2x D y=sin2x乘cos2x下列函数中以π/2为周期的是 A=sin2x+cos4x B y=sin y2x乘cos4x C y=sin2x+cos2x D y=sin2x乘cos2x
下列函数中以π/2为周期的是 A=sin2x+cos4x B y=sin y2x乘cos4x C y=sin2x+cos2x D y=sin2x乘cos2x
下列函数中以π/2为周期的是 A=sin2x+cos4x B y=sin y2x乘cos4x C y=sin2x+cos2x D y=sin2x乘cos2x

下列函数中以π/2为周期的是 A=sin2x+cos4x B y=sin y2x乘cos4x C y=sin2x+cos2x D y=sin2x乘cos2x下列函数中以π/2为周期的是 A=sin2x+cos4x B y=sin y2x乘cos4x C y=sin2x+cos2x D y=sin2x乘cos2x
应该选D,y=sin2x*cos2x=1/2*sin4x,T=2π/4=π/2
A:T=π
B:选项没看懂
C:T=π

D