Hi Math help Forum
I'm not sure if this is the right thread to be posting this in, so sorry.
the question is to calculate |a x b| where
a= i+j-k
b=2i-j+3k
I've worked out a x b to be 2i - 5j - 3k , but I'm not really sure as to where to go from here.
any help would be great
Thanks
ES