(1/3)高中数学　若平面向量m=(根号3,-2sinx/2),向量n=(cosx,-cosx/2)x属于R,函数f(x)=向量m＊向量n...(1/3)高中数学　若平面向量m=(根号3,-2sinx/2),向量n=(cosx,-cosx/2)x属于R,函数f(x)=向量m＊向量n　1.

(1/3)高中数学　若平面向量m=(根号3,-2sinx/2),向量n=(cosx,-cosx/2)x属于R,函数f(x)=向量m＊向量n...(1/3)高中数学　若平面向量m=(根号3,-2sinx/2),向量n=(cosx,-cosx/2)x属于R,函数f(x)=向量m＊向量n　1.
(1/3)高中数学　若平面向量m=(根号3,-2sinx/2),向量n=(cosx,-cosx/2)x属于R,函数f(x)=向量m＊向量n...
(1/3)高中数学　若平面向量m=(根号3,-2sinx/2),向量n=(cosx,-cosx/2)x属于R,函数f(x)=向量m＊向量n　1.

(1/3)高中数学　若平面向量m=(根号3,-2sinx/2),向量n=(cosx,-cosx/2)x属于R,函数f(x)=向量m＊向量n...(1/3)高中数学　若平面向量m=(根号3,-2sinx/2),向量n=(cosx,-cosx/2)x属于R,函数f(x)=向量m＊向量n　1.
f(x)=m×n=√3cosx+(-2sinx/2)×(-cosx/2)
=√3cosx+2sinx/2×cosx/2
=√3cosx+sinx
=2sin(x+π/3)

f(x)=m×n=√3cosx+(-2sinx/2)×(-cosx/2) =√3cosx+2sinx/2×cosx/2 =√3cosx+sinx =2sin(x+π/3) 我觉得他做的对很好啊

f(x)=m乘以n=√3cosx+(-2sinx/2)乘以(-cosx/2)
=√3cosx+2sinx/2乘以cosx/2
=√3cosx+sinx
=2sin(x+π/3)