1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Defining a vector in magnitude,angle form.

  1. Oct 21, 2014 #1
    I've learned that vectors can be defined in,basically, two ways. (1) Unit Vector Form (xi+yj+zk) (2)Magnitude angle form.
    The second form always adds a confusion in problems. For instance let's define a function A and B as:
    YzorQto.png

    When we define -B why do we do it as follows:
    pj8S94Y.png

    I mean why do we write it as -B isn't the information of the direction clear from the angle between A and the Blue line?
     
  2. jcsd
  3. Oct 21, 2014 #2

    SteamKing

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    You may not always have a diagram to refer to, especially if your vector calculations get long and involved.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...