f(x)=cos(2x-π/3)+2sin(x-π/4)sin(x+π/4). f(x)=1/2cos 2x+√3/2sin 2x+2(sin x-cos x)(xin x+cos x). =1/2cos 2x+√3/2sin 2x-2(cos^2 x-sin^2 x).
確定! 回上一頁