How do you integrate: sin(x)sin(nx)dx between Pi and Pi/2 when n doesnt equal 1 by parts doesnt work does it? any help would be great
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Originally Posted by ben.mahoney@tesco.net How do you integrate: sin(x)sin(nx)dx between Pi and Pi/2 when n doesnt equal 1 by parts doesnt work does it? any help would be great Remember that: (1) (2) Now (2)-(1) gives: Hence: Which means So your integral becomes Which should be fairly simple if you remember that
Originally Posted by ben.mahoney@tesco.net How do you integrate: sin(x)sin(nx)dx between Pi and Pi/2 when n doesnt equal 1 by parts doesnt work does it? any help would be great Use the fact that
One possibility is the application of the famous formula... Kind regards
thanks everyone got it now
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