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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: Integrate cos3x elog(sinx) dx
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[Post New]13 Mar 2008 23:46:57 IST
    Subject: Integrate cos3x elog(sinx) dx
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SPD (0)

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Integrate    cos3x elog(sinx) dx
 
  1. (-sin4x)/4    + c
  2. (-cos4x)/4   + c
  3. (esinx)4        + c
  4. none of these
    
[Post New]13 Mar 2008 23:52:42 IST
    Subject: Re:Integrate cos3x elog(sinx) dx
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hash_include (381)

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elog(sinx)  is nothing but sinx
hence, the integral is:
 cos3x. sinx dx
now put cos x = t
-sinxdx = dt

ans is
2. (-cos4x)/4   + c
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