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How do you integrate cos squared (1 Viewer)

rahulpaley

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ok my problem is this. I need to know how youintegrate cos^2(x/4)

That is cos squared times x/4
 

Trebla

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This uses an Ext1 method:
cos (x/2) = 2cos2(x/4) - 1

Make cos2(x/4) the subject and integrate...
 

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