## INT Group Title what are two unit vectors that are orthogonal to both <1,-1,1> and <0,4,4> 2 years ago 2 years ago

1. YTheManifold Group Title

Cross product..

2. INT Group Title

Im not getting the right answer for some reason

3. YTheManifold Group Title

Normalize!

4. INT Group Title

can you show me the steps?

5. YTheManifold Group Title

$\frac{v\times w}{||v\times w||}$

6. INT Group Title

I don't understand the denominator

7. INT Group Title

I guess my question would be how do you normalize

8. YTheManifold Group Title

Well if you have a vector v=(x,y,z) then $||v|| := \sqrt{x^2+y^2+z^2}$

9. Zarkon Group Title

$\|<a,b,c>\|=\sqrt{a^2+b^2+c^2}$

10. INT Group Title

ok, I got one of them. Would the other orthogonal vector just be B X A ?

11. YTheManifold Group Title

Just take the negative!

12. YTheManifold Group Title

Multiply by -1.

13. INT Group Title

oh, you're right!

14. INT Group Title

haha thanks.