Find all unit vectors parallel to the xy-plane and perpendicular to the vector [1, -2, 2]. so Using Dot Product After that i rearrange and get stuck with x-x=0... I don't see any other ways to do this.
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Originally Posted by JimmyRP Find all unit vectors parallel to the xy-plane and perpendicular to the vector [1, -2, 2]. I find two. The key is the fact they must be units.
so you got so so the vector is perpendicular to it but we need it to be a unit vector its magnitude is so our unit vector is = we get +ve and -ve depending on whether y>0 or <0 i.e two opposite directions which makes sense
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