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OpenStudy (anonymous):

What are orthogonal functions and can anyone tell me how'd they get equation 15.5.7 in the following link? http://www.physicsforums.com/showthread.php?t=755731 Thanks ps. My first question so i've no idea how to attach a file.

OpenStudy (anonymous):

Please someone tell me how did they get equation 15.5.7 in attached file?

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