Finding vector perpendicular to other vectors

[amit25]

Find vector having unit length perpendicular to both x and y. x=(1,2,3) and y=(-1,0,1)?

im not sure where to begin

 

[gneill]

Find vector having unit length perpendicular to both x and y. x=(1,2,3) and y=(-1,0,1)?

im not sure where to begin

Start with the properties of the vector operations that you know.

 

[amit25]

like the dot product? sorry i haven't done vectors in 2 years so I am rusty

 

[gneill]

like the dot product? sorry i haven't done vectors in 2 years so I am rusty

Sounds like a review is in order Why don't you list the common vector operations and do a bit of research on their properties. Hint: concentrate on the two forms of vector multiplication.

 

[amit25]

okay so i think its the cross product and when i do it i get (2,-4,2), is that all? or is there something more

 

[gneill]

okay so i think its the cross product and when i do it i get (2,-4,2), is that all? or is there something more

The cross product is the right choice, and your result is good.