高中(高一)数学三角函数
H(x)=cos²(x+π/3)-1/2-1/2sin(2x+2π/3)
=1/2[1+cos(2x+2π/3)]-1/2-1/2sin(2x+2π/3)
=﹛1+cos(2x+2π/3)-sin(2x+2π/3)﹜/2-1/2
=﹛1+√2cos(2x+2π/3+π/4)﹜/2-1/2给你思考空间
H(x)=cos²(x+π/3)-1/2-1/2sin(2x+2π/3)
=1/2[1+cos(2x+2π/3)]-1/2-1/2sin(2x+2π/3)
=﹛1+cos(2x+2π/3)-sin(2x+2π/3)﹜/2-1/2
=﹛1+√2cos(2x+2π/3+π/4)﹜/2-1/2给你思考空间