prove that ... integrate sqrt [(1-x)/(1+x)] dx ( upper limit = 1 , lower limit =0 ) = pi/2 - 1 by using x = cos 2 theta thanks in advanced!
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Originally Posted by ose90 prove that ... integrate sqrt [(1-x)/(1+x)] dx ( upper limit = 1 , lower limit =0 ) = pi/2 - 1 by using x = cos 2 theta thanks in advanced! Note: 1. . 2. .
Originally Posted by mr fantastic Note: 1. . 2. . Thanks you very much, I wrongly conceive that 1-cos 2 theta = sin theta and 1+ cos 2 theta = cos theta , no wonder I couldn't solve it! Now I can solve it, thank you!
Originally Posted by mr fantastic Note: 1. . 2. . Hmm, I have solved it ! Thanks if you have come here again.
Last edited by ose90; Nov 17th 2008 at 05:52 AM.
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