May 15th, 2017, 02:43 AM  #1 
Newbie Joined: May 2017 From: qatar Posts: 6 Thanks: 0  plz help me to solve this problem 
May 15th, 2017, 03:12 AM  #2 
Math Team Joined: Jan 2015 From: Alabama Posts: 3,109 Thanks: 855 
Remembering the trig identity , I would let . Then so the integral becomes . Now you should remember that is defined as so that integral is the same as . That has cosine to an odd power and there is a standard way of treating such integrals multiply both numerator and denominator by to get . Let so that and the integral becomes which can be done by "partial fractions". Last edited by Country Boy; May 15th, 2017 at 03:15 AM. 
May 15th, 2017, 03:51 AM  #3  
Math Team Joined: Jul 2011 From: Texas Posts: 2,737 Thanks: 1387  Quote: WolframAlpha: Computational Knowledge Engine  
May 15th, 2017, 05:07 AM  #4  
Newbie Joined: May 2017 From: qatar Posts: 6 Thanks: 0  my reply Quote:
 

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