What is the angle between two vectors.A=i-j and B=i+k?
1 Answer
Jun 28, 2018
Explanation:
#{(bbA=bbi-bbj ), (bb B=bbi+bbk):}#
From that definition:
-
#cos alpha = (bbA * bbB)/(abs bbA abs bbB) # -
#bbA * bbB = (:1, -1, 0:)*(:1, 0, 1:) = 1# -
#abs bbA = sqrt2# -
#abs bbB = sqrt2#