Posted by Laura on Sunday, February 15, 2009 at 5:17pm.
how do you integrate sin (x^2) dx?

math/ cal  drwls, Sunday, February 15, 2009 at 7:07pm
There is a solution given here that uses complex numbers but gives a simple real answer which is correct:
http://answers.yahoo.com/question/index?qid=20070116202856AA7DM5R
You might be able to get the same answer using integration by parts

math/ cal  drwls, Sunday, February 15, 2009 at 7:14pm
The answer is
(x/2)  (1/4)sin(2x)
I don't see any easier way to get it than the "Euler" proof in the link I gave you

math/ cal  Laura, Sunday, February 15, 2009 at 7:15pm
thank you for your answer, but this example problem is not the same as mine. the example problem is (sin (x))^2, in other words the whole quantity is squared. mine is just sin of x^2. any suggestions here?
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