OK... I have seen an error in what I'm doing here. I want a vector perpendicular to both of them - they aren't perpendicular to each other so I can't find the dot product of a and b.
So what would I do instead? I'm very confused
I am looking for a unit vector that is perpendicular to the following vectors
So I know that find a perpendicular vector that
So I get but this isn't one of the options. I know that multiples of it can be also perpendicular, can someone point out where I'm going wrong?
Cross product - Wikipedia, the free encyclopedia)
There's the formula in this section The explanation of what the cross product is is above.
And if you want a unit vector, once you get the result of the cross product, divide each ordinate by the length of the vector, that is for a vector (x,y,z)