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39 . ( Cos 2 X than 3 x d x - Cost Sees'x / sinx Cost sint dy oso COSXI sin Ex sink COSX
39 . ( Cos 2 X than 3 x d x - Cost Sees'x / sinx Cost sint dy oso COSXI sin Ex sink COSX ( ( 1 - Cos 2 1 ) sink tosA Sink - Cos x sinx lost sink [ cost sinx cost cast Stand - cost sink U= sink du = cost Insect! cost thestore in 2 9.9
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