f(x)=(1-cos2x)cos^2x化简等于?
问题描述:
f(x)=(1-cos2x)cos^2x化简等于?
答
f(x)=(1-cos2x)cosx f(x)=2sinxcosx f(x)=(1/2)sin(2x) f(x)=(1/2)[1-cos4x] 是周期为2π/4=π/2的偶函数.
f(x)=(1-cos2x)cos^2x化简等于?
f(x)=(1-cos2x)cosx f(x)=2sinxcosx f(x)=(1/2)sin(2x) f(x)=(1/2)[1-cos4x] 是周期为2π/4=π/2的偶函数.