festx Posted January 29, 2005 Share Posted January 29, 2005 I am having a problem with this particular problem: Integrate pi(sin(x)^2 - (1/2)^2) from pi/4 to pi/2 I used a trig identity and got this: pi [ (x/2 - sin(2x)/4) - (1x/4) ] however when I evaluate this from pi/4 to pi/2 I am not getting the correct result. Any help is much appreciated. steve Link to comment Share on other sites More sharing options...
Dave Posted February 1, 2005 Share Posted February 1, 2005 I get the answer as being pi*(pi+4)/16, which I think is right. Link to comment Share on other sites More sharing options...
festx Posted February 2, 2005 Author Share Posted February 2, 2005 Yes it is. I was making a mistake with the integration and did not catch it until yesterday. Thanks for yor help. Link to comment Share on other sites More sharing options...
Dave Posted February 2, 2005 Share Posted February 2, 2005 Not a problem Link to comment Share on other sites More sharing options...
Guest Luis Posted March 30, 2005 Share Posted March 30, 2005 I need help too for the washer method washer method y=x, y=0, y=4, x=6 Link to comment Share on other sites More sharing options...
Dave Posted March 30, 2005 Share Posted March 30, 2005 It would help if you gave us the integral you're trying to evaluate Link to comment Share on other sites More sharing options...
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