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Solution 24
by ali cosx cos2x cos4x ......cos2n-1 x cos(2n -1 )x = And 1 + cosx cos2x cos4x ......cos2n-1 x cos(2n+1 -2 )x = From the two relations : cosx cos2x cos4x ......cos2n-1 x + cos(2n -1 )x =(1 + cosx cos2x cos4x ......cos(2n+1 -2 )x ) Integrating ,we get
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by : jury |
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