Given vectors u= (3, -4, 1) and v= (2, 1, -5)
Find:
a) u x v
b)|u x v|
you should have learned some type of algorithm or method of finding the cross product.
About 2/3 of the way down this page is good illustration of a method
http://www.ltcconline.net/greenl/Courses/107/vectors/dotcros.htm
I got u x v = [19,17,11)
you can check this to be correct by taking the dot product with each of the original vectors, it is correct.
then | [19,17,11) |
= √(361+289+121) = √771