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cyborg (65)

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Olaaa!! Perrrfect answer. 11  [16 rates]

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total posts: 49    
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ans is1/2.
 
Use 2sin^2 = 1-cos^2 .
 
Then use [x][0 ] sinx/x
 this reply: 2 points  (with Olaaa!! Perrrfect answer.   in 1 votes )   [?]
 
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