已知函数f(x)=sin^4x+2√3sinxcosx-cos^4x

1个回答

  • f(x)=sin^4x+2√3sinxcosx-cos^4x=sin²x+2√3sinxcosx-cos²x=√3sin2x-cos2x=2(√3sin2x/2-cos2x/2)=2sin(2x-π/6)

    (1)函数f(x)的振幅为2,周期为π

    (2)函数f(x)是正弦函数,

    (3)可由y=sinx的图像上下拉长一倍,左右压缩一倍,并向右移动π/12得到;

    (4)在[0,π/2]上,-1≤f(x)≤2,图像始终在直线y=2的下方,函数y=f(x)-m0;

    (5)|f(x)-m|