- #1
Ruzic
- 5
- 0
Homework Statement
The vector a = [2,-5,6] is given. Determine one vector that is perpendicular to a.
Homework Equations
Cross product or dot product
The Attempt at a Solution
I messed around with the dot product by making the right side 0 because cos 0 = 90 but i don't think i can do anything with just 1 equation. For the cross product i got [-5z - 6y, 6x - 2z, 2y +5x] and idk where to take it from there.
i thought maybe subbing this into a x b = |a||b|Sin(1) so
[-5z - 6y, 6x - 2z, 2y +5x] = (√65)(√x^2 + y^2 + z^2)
but idk if there's any point in doing that
If you know how to do this please help :)