Integration by inverse substitution

Description
Relations of various trigonometric functions are discussed in this video lecture.as well as integration of trigonometric functions using inverse substitution method and by completing the square is explained with the help of few examples.
Prof. David Jerison, Single Variable Calculus: 25. Inverse Substitution, Massachusetts Institute of Technology: MIT OpenCourseWare),http://ocw.mit.edu (Accessed July 12,2011). License: Creative Commons BY-NC-SA:http://ocw.mit.edu/terms/#cc