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    hey can someone help me to integrate the following: pleaseee..
    (any help appreciated)

    (sinx)/(cosx)^4
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    (Original post by going_crazy12)
    hey can someone help me to integrate the following: pleaseee..
    (any help appreciated)

    (sinx)/(cosx)^4
    To clarify, you do mean \dfrac{sin(x)}{cos^4(x)} right?

    You can rewrite the function in terms of tan(x) and sec(x) and then use a substitution.
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    (Original post by going_crazy12)
    hey can someone help me to integrate the following: pleaseee..
    (any help appreciated)

    (sinx)/(cosx)^4
    I would convert (cosx)^4 to (cos(x)^2)^2 and then use an identity to change cos into sin, and then make the substitution.
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    Or note that -sin x is the derivative of cos x
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    thnks for the replies guyz but could any of u solve the whole thing.. pls..
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    (Original post by going_crazy12)
    thnks for the replies guyz but could any of u solve the whole thing.. pls..
    No, do it yourself :p: There's an "obvious" substitution to make (at least, it's obvious if you spot it), and it's made even more obvious by SimonM's post.
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    (Original post by SimonM)
    Or note that -sin x is the derivative of cos x
    thank u simon,
    i was using this method but i got stuck after.. really confused
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    (Original post by going_crazy12)
    thank u simon,
    i was using this method but i got stuck after.. really confused
    If you want more help you'll have to show us your working, then we can tell you where you're going wrong or give you a poke in the right direction [but not do the whole thing for you].
 
 
 
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