Geometrical interpretation of dot product

Description
The geometrical explanation of the dot product is given. How to find the length and angle between two vectors is discussed in this video tutorial. What happens when two vectors are perpendicular to each other is also analysed. How to find the components of a given vector along a given unit vector is explained here.
Prof. Denis Auroux, Maths, Fall 2007,18.02 Multivariable Calculus: 2. Determinants, Massachusetts Institute of Technology: MIT OpenCourseWare),http://ocw.mit.edu (Accessed August 14,2011). License: Creative Commons BY-NC-SA:http://ocw.mit.edu/terms/#cc