To fine double integral in polar coordinates.

Description
The steps to find double integral in polar coordinate are discussed in this video lecture. It states that first the function should be expressed in polar coordinates. Then initially making theta constant the function should be integrated with respect to r, and then keeping r fixed it will be integrated with respect to theta. Also the geometrical representation of double integration in polar coordinates is explained.
Prof. Denis Auroux, Maths, Fall 2007,18.02 Multivariable Calculus: 17: Polar Coordinates, Massachusetts Institute of Technology: MIT OpenCourseWare),http://ocw.mit.edu (Accessed September 19,2011). License: Creative Commons BY-NC-SA:http://ocw.mit.edu/terms/#cc