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    Use the substitution
    u = 1 + sin (x)
    to show the integral of
    sin(x)cos(x)(1+sin(x))^5 dx = 1/42 (1+sin(x))^6 (6sin(x)-1) + c

    its from a past edexcel paper, not sure which one
    im not sure how to go about this one, i got sin(x) = u-1 and
    possibly cos(x) = root2 -u
    any help would be appreciated
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    You don't need to try to obtain cos x. Have you found du/dx yet? All will become clear.
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    (Original post by Mr M)
    You don't need to try to obtain cos x. Have you found du/dx yet? All will become clear.
    oh ye, i keep forgetting that!
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    (Original post by Mr M)
    You don't need to try to obtain cos x. Have you found du/dx yet? All will become clear.
    cheers mate
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    No problem. Well done for sorting it out yourself.
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    (Original post by Mr M)
    No problem. Well done for sorting it out yourself.
    ye, my teacher has given us a mammoth homework - 20 exams questions, which is like 3 papers worth, 4 and a half hours worth, all integration!
    and we only have 2 nights to do it
 
 
 
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Updated: September 29, 2010
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