Easy Vector Question

The unit vector
圖片參考：http://mathworld.wolfram.com/images/equations/UnitVector/inline2.gif
is defined by






圖片參考：http://mathworld.wolfram.com/images/equations/UnitVector/equation1.gif


let v=√3i - j
|v|=√((√3 )^2+1)=2
The unit vector
=1/2(√3i - j)
=√3/2 i - 1/2 j

Find the magnitude of the vector and divided it by, then you get the unit vector.


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