Perpendicular 3Dimensional Vectors

  • #1
thursdaytbs
53
0
How would you go about finding a perpendicular vector, to two 3 dimensional vectors? One way, I solved is using the cross product of the two vectors. Splitting the i's j's and k's up and solving using a determinent. But, what's another way to do it?
 

Answers and Replies

  • #2
whozum
2,221
1
Find the normal to the plane that contains the two vectors?
 
  • #3
quantumdude
Staff Emeritus
Science Advisor
Gold Member
5,575
23
whozum said:
Find the normal to the plane that contains the two vectors?

That's the same thing.

thursdaytbs said:
But, what's another way to do it?

You did it "the easy way", which is how I would have done it. "The hard way" would be to find a vector whose dot product with each of the first two vectors vanishes. Pure silliness, that route.
 
  • #4
whozum
2,221
1
That's the same thing.

Worded differently, might have given him a different idea? :confused:
 

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