Given v = 3i+7j and w=-4i-j find the angle between v and w?
回答 (2)
2016-11-18 2:56 am
Take the dot product and also calculate the magnitudes |v| and |w|.
v dot w = |v| |w| cos(theta)
v dot w = |v| |w| cos(theta)
2016-11-18 3:01 am
收錄日期: 2021-04-27 23:16:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20161117185533AAnXfiM