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 1 answerLast reply by: Jamal TischlerThu Dec 25, 2014 9:00 AMPost by Rajah Cook on September 18, 2013Hi, it seems as though the "Extra Example 3" isn't playing because the cam file "Phys-1-2-Cam-Ex3.flv" is being linked to with the address "www.educator.com/media/ex/physics-b/Phys-1-2-cam-Ex3.flv".  Note: the word "cam" should be capitalised.Cheers :) 1 answerLast reply by: Jamal TischlerThu Dec 25, 2014 8:52 AMPost by Sam Mikhael on January 27, 2012can someone explain to me exactly what the parallelogram law is cuz i didnt get it??? 1 answerLast reply by: Nathaniel HinojosaThu Apr 7, 2011 6:58 PMPost by Nathaniel Hinojosa on April 7, 2011Hmm, Extra Example 3 is playing for some reason 1 answerLast reply by: Vanessa PunalSat Apr 24, 2010 4:46 PMPost by Ana-Maria Greene on October 26, 2009How can I find the value of s in the interval [0,2/2] such that tan s= .790325578?

### Related Articles:

• Vectors are added by placing the tail of one vector on the head of the preceding vector; the sum of the vectors is obtained by joining the first tail to the last head.
• The analytical method of adding vectors makes use of the laws of cosines and sines.
• A vector is completely specified by giving its magnitude or direction, or by giving its components in a coordinate system.
• Two vectors are equal if their respective components are equal.
• The dot product of two vectors is a scalar; it is equal to the product of the magnitudes of the vectors and cosine the angle between them.

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

• Intro 0:00
• Graphical Method 0:10
• Magnitude and Direction of Two Vectors
• Analytical Method or Algebraic Method 8:45
• Parallelogram Rule
• Law of Cosines
• Law of Sines
• Components of a Vector 21:35
• Example: Vector Components
• Introducing Third Dimension
• Right Handed System
• Specifying a Vector 34:44
• Example: Calculate the Components of Vector
• Vector Addition by Means of Components 41:23
• Equality of Vectors 47:11
• Dot Product 48:39
• Extra Example 1: Vector Addition
• Extra Example 2: Angle Between Vectors
• Extra Example 3: Vector Addition